Jens Lehmann

Principal Scientist
Amazon Alexa AI

Principal Investigator ScaDS.AI, TU Dresden

Member of Institute for Applied Informatics, Dresden / Leipzig

Profiles: LinkedIn, Google Scholar, DBLP, Web-ID

Office

Amazon Office: Großenhainer Str. 5a, 01097 Dresden
InfAI: Schnorrstraße 70, 01069 Dresden

Short CV


Jens Lehmann (http://www.jens-lehmann.org) works full time as a principal scientist at Amazon Alexa AI. He also leads the „Smart Data Analytics“ research group with his affiliated senior researchers at InfAI and TU Dresden as well as his PhD students. Previously, he was a lead scientist for Conversational AI and Knowledge Graphs at Fraunhofer IAIS and a full professor (W3) at the University of Bonn. His research interests involve Semantic Web, machine learning, question answering & dialogue systems, distributed computing and knowledge representation. Please see his website for more details.

Research Interests


  • Machine Learning
  • Semantic Web & Knowledge Graphs
  • Conversational AI

Publications


309 entries « 3 of 7 »

2019

Ali, Mehdi; Hoyt, Charles Tapley; Domingo-Fernández, Daniel; Lehmann, Jens

Predicting Missing Links Using PyKEEN Inproceedings

In: Proceedings of the ISWC 2019 Satellite Tracks (Posters & Demonstrations, Industry, and Outrageous Ideas) co-located with 18th International Semantic Web Conference (ISWC 2019), Auckland, New Zealand, October 26-30, 2019, pp. 245–248, CEUR-WS.org, 2019.

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Ali, Mehdi; Jabeen, Hajira; Hoyt, Charles Tapley; Lehmann, Jens

The KEEN Universe - An Ecosystem for Knowledge Graph Embeddings with a Focus on Reproducibility and Transferability Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part II, pp. 3–18, Springer, 2019.

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Chaudhuri, Debanjan; Rony, Md. Rashad Al Hasan; Jordan, Simon; Lehmann, Jens

Using a KG-Copy Network for Non-goal Oriented Dialogues Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part I, pp. 93–109, Springer, 2019.

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Dubey, Mohnish; Banerjee, Debayan; Abdelkawi, Abdelrahman; Lehmann, Jens

LC-QĂD 2.0: A Large Dataset for Complex Question Answering over Wikidata and DBpedia Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part II, pp. 69–78, Springer, 2019.

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Frey, Johannes; Hofer, Marvin; Obraczka, Daniel; Lehmann, Jens; Hellmann, Sebastian

DBpedia FlexiFusion the Best of Wikipedia Wikidata Your Data Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part II, pp. 96–112, Springer, 2019.

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Frey, Johannes; Hofer, Marvin; Obraczka, Daniel; Lehmann, Jens; Hellmann, Sebastian

DBpedia FlexiFusion the Best of Wikipedia textbackslashtextgreater Wikidata textbackslashtextgreater Your Data Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part II, pp. 96–112, Springer, 2019.

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Kristiadi, Agustinus; Khan, Mohammad Asif; Lukovnikov, Denis; Lehmann, Jens; Fischer, Asja

Incorporating Literals into Knowledge Graph Embeddings Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part I, pp. 347–363, Springer, 2019.

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Lukovnikov, Denis; Fischer, Asja; Lehmann, Jens

Pretrained Transformers for Simple Question Answering over Knowledge Graphs Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part I, pp. 470–486, Springer, 2019.

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Maheshwari, Gaurav; Trivedi, Priyansh; Lukovnikov, Denis; Chakraborty, Nilesh; Fischer, Asja; Lehmann, Jens

Learning to Rank Query Graphs for Complex Question Answering over Knowledge Graphs Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part I, pp. 487–504, Springer, 2019.

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Mami, Mohamed Nadjib; Graux, Damien; Scerri, Simon; Jabeen, Hajira; Auer, Sören; Lehmann, Jens

How to Feed the Squerall with RDF and Other Data Nuts? Inproceedings

In: Proceedings of the ISWC 2019 Satellite Tracks (Posters & Demonstrations, Industry, and Outrageous Ideas) co-located with 18th International Semantic Web Conference (ISWC 2019), Auckland, New Zealand, October 26-30, 2019, pp. 293–296, CEUR-WS.org, 2019.

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Mami, Mohamed Nadjib; Graux, Damien; Scerri, Simon; Jabeen, Hajira; Auer, Sören; Lehmann, Jens

Squerall: Virtual Ontology-Based Access to Heterogeneous and Large Data Sources Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part II, pp. 229–245, Springer, 2019.

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Mehmood, Qaiser; Nadgeri, Abhishek; Saleem, Muhammad; Singh, Kuldeep; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

Microbenchmarks for Question Answering Systems Using QaldGen Inproceedings

In: Proceedings of the ISWC 2019 Satellite Tracks (Posters & Demonstrations, Industry, and Outrageous Ideas) co-located with 18th International Semantic Web Conference (ISWC 2019), Auckland, New Zealand, October 26-30, 2019, pp. 261–264, CEUR-WS.org, 2019.

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Sejdiu, Gezim; Rula, Anisa; Lehmann, Jens; Jabeen, Hajira

A Scalable Framework for Quality Assessment of RDF Datasets Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part II, pp. 261–276, Springer, 2019.

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Singh, Kuldeep; Saleem, Muhammad; Nadgeri, Abhishek; Conrads, Felix; Pan, Jeff Z.; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

QaldGen: Towards Microbenchmarking of Question Answering Systems over Knowledge Graphs Inproceedings

In: The Semantic Web - ISWC 2019 - 18th International Semantic Web Conference, Auckland, New Zealand, October 26-30, 2019, Proceedings, Part II, pp. 277–292, Springer, 2019.

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Rula, Anisa; Palmonari, Matteo; Rubinacci, Simone; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens; Maurino, Andrea; Esteves, Diego

TISCO: Temporal Scoping of Facts Journal Article

In: J. Web Semant., vol. 54, pp. 959–960, 2019.

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Ali, Mehdi; Hoyt, Charles Tapley; Domingo-Fernández, Daniel; Lehmann, Jens; Jabeen, Hajira

BioKEEN: a library for learning and evaluating biological knowledge graph embeddings Journal Article

In: Bioinform., vol. 35, no. 18, pp. 3538–3540, 2019.

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Lorena, Ana Carolina; Garcia, Lu'is Paulo F.; Lehmann, Jens; Souto, Marc'ilio Carlos Pereira; Ho, Tin Kam

How Complex Is Your Classification Problem?: A Survey on Measuring Classification Complexity Journal Article

In: ACM Comput. Surv., vol. 52, no. 5, pp. 107:1–107:34, 2019.

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Westphal, Patrick; Bühmann, Lorenz; Bin, Simon; Jabeen, Hajira; Lehmann, Jens

SML-Bench - A benchmarking framework for structured machine learning Journal Article

In: Semantic Web, vol. 10, no. 2, pp. 231–245, 2019.

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2018

Jabeen, Hajira; Dadwal, Rajjat; Sejdiu, Gezim; Lehmann, Jens

Divided We Stand Out! Forging Cohorts fOr Numeric Outlier Detection in Large Scale Knowledge Graphs (CONOD) Inproceedings

In: Knowledge Engineering and Knowledge Management - 21st International Conference, EKAW 2018, Nancy, France, November 12-16, 2018, Proceedings, pp. 534–548, Springer, 2018.

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Graux, Damien; Sejdiu, Gezim; Jabeen, Hajira; Lehmann, Jens; Sui, Danning; Muhs, Dominik; Pfeffer, Johannes

Profiting from Kitties on Ethereum: Leveraging Blockchain RDF with SANSA Inproceedings

In: Proceedings of the Posters and Demos Track of the 14th International Conference on Semantic Systems co-located with the 14th International Conference on Semantic Systems (SEMANTiCS 2018), Vienna, Austria, September 10-13, 2018, CEUR-WS.org, 2018.

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Sejdiu, Gezim; Ermilov, Ivan; Lehmann, Jens; Mami, Mohamed Nadjib

DistLODStats: Distributed Computation of RDF Dataset Statistics Inproceedings

In: The Semantic Web - ISWC 2018 - 17th International Semantic Web Conference, Monterey, CA, USA, October 8-12, 2018, Proceedings, Part II, pp. 206–222, Springer, 2018.

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Sejdiu, Gezim; Ermilov, Ivan; Mami, Mohamed Nadjib; Lehmann, Jens

STATisfy Me: What Are My Stats? Inproceedings

In: Proceedings of the ISWC 2018 Posters & Demonstrations, Industry and Blue Sky Ideas Tracks co-located with 17th International Semantic Web Conference (ISWC 2018), Monterey, USA, October 8th - to - 12th, 2018, CEUR-WS.org, 2018.

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Acosta, Maribel; Zaveri, Amrapali; Simperl, Elena; Kontokostas, Dimitris; Flöck, Fabian; Lehmann, Jens

Detecting Linked Data quality issues via crowdsourcing: A DBpedia study Journal Article

In: Semantic Web, vol. 9, no. 3, pp. 303–335, 2018.

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Esteves, Diego; Rula, Anisa; Reddy, Aniketh J.; Lehmann, Jens

Towards Veracity Assessment in RDF Knowledge Bases: An Exploratory Analysis Journal Article

In: Journal of Data and Information Quality, 2018.

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Chaudhuri, Debanjan; Kristiadi, Agustinus; Lehmann, Jens; Fischer, Asja

Improving Response Selection in Multi-Turn Dialogue Systems by Incorporating Domain Knowledge Inproceedings

In: Proceedings of the 22nd Conference on Computational Natural Language Learning, CoNLL 2018, Brussels, Belgium, October 31 - November 1, 2018, pp. 497–507, Association for Computational Linguistics, 2018.

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Nejad, Najmeh Mousavi; Scerri, Simon; Lehmann, Jens

KnIGHT: Mapping Privacy Policies to GDPR Inproceedings

In: Knowledge Engineering and Knowledge Management - 21st International Conference, EKAW 2018, Nancy, France, November 12-16, 2018, Proceedings, pp. 258–272, Springer, 2018.

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Zafar, Hamid; Napolitano, Giulio; Lehmann, Jens

Formal Query Generation for Question Answering over Knowledge Bases Inproceedings

In: The Semantic Web - 15th International Conference, ESWC 2018, Heraklion, Crete, Greece, June 3-7, 2018, Proceedings, pp. 714–728, Springer, 2018.

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Thakkar, Harsh; Punjani, Dharmen; Lehmann, Jens; Auer, Sören

Two for one: querying property graph databases using SPARQL via gremlinator Inproceedings

In: Proceedings of the 1st ACM SIGMOD Joint International Workshop on Graph Data Management Experiences & Systems (GRADES) and Network Data Analytics (NDA), Houston, TX, USA, June 10, 2018, pp. 12:1–12:5, ACM, 2018.

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Westphal, Patrick; Fernández, Javier D.; Kirrane, Sabrina; Lehmann, Jens

SPIRIT: A Semantic Transparency and Compliance Stack Inproceedings

In: Proceedings of the Posters and Demos Track of the 14th International Conference on Semantic Systems co-located with the 14th International Conference on Semantic Systems (SEMANTiCS 2018), Vienna, Austria, September 10-13, 2018, CEUR-WS.org, 2018.

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Stadler, Claus; Saleem, Muhammad; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

Efficiently Pinpointing SPARQL Query Containments Inproceedings

In: Web Engineering - 18th International Conference, ICWE 2018, Cáceres, Spain, June 5-8, 2018, Proceedings, pp. 210–224, Springer, 2018.

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Collarana, Diego; Heuss, Timm; Lehmann, Jens; Lytra, Ioanna; Maheshwari, Gaurav; Nedelchev, Rostislav; Schmidt, Thorsten; Trivedi, Priyansh

A Question Answering System on Regulatory Documents Inproceedings

In: Legal Knowledge and Information Systems - JURIX 2018: The Thirty-first Annual Conference, Groningen, The Netherlands, 12-14 December 2018, pp. 41–50, IOS Press, 2018.

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Zafar, Hamid; Napolitano, Giulio; Lehmann, Jens

Deep Query Ranking for Question Answering over Knowledge Bases Inproceedings

In: Machine Learning and Knowledge Discovery in Databases - European Conference, ECML PKDD 2018, Dublin, Ireland, September 10-14, 2018, Proceedings, Part III, pp. 635–638, Springer, 2018.

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Saleem, Muhammad; Mehmood, Qaiser; Stadler, Claus; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

Generating SPARQL Query Containment Benchmarks Using the SQCFramework Inproceedings

In: Proceedings of the ISWC 2018 Posters & Demonstrations, Industry and Blue Sky Ideas Tracks co-located with 17th International Semantic Web Conference (ISWC 2018), Monterey, USA, October 8th - to - 12th, 2018, CEUR-WS.org, 2018.

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Banerjee, Debayan; Dubey, Mohnish; Chaudhuri, Debanjan; Lehmann, Jens

Joint Entity and Relation Linking Using EARL Inproceedings

In: Proceedings of the ISWC 2018 Posters & Demonstrations, Industry and Blue Sky Ideas Tracks co-located with 17th International Semantic Web Conference (ISWC 2018), Monterey, USA, October 8th - to - 12th, 2018, CEUR-WS.org, 2018.

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Dubey, Mohnish; Banerjee, Debayan; Chaudhuri, Debanjan; Lehmann, Jens

EARL: Joint Entity and Relation Linking for Question Answering over Knowledge Graphs Inproceedings

In: The Semantic Web - ISWC 2018 - 17th International Semantic Web Conference, Monterey, CA, USA, October 8-12, 2018, Proceedings, Part I, pp. 108–126, Springer, 2018.

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Bühmann, Lorenz; Lehmann, Jens; Westphal, Patrick; Bin, Simon

DL-Learner Structured Machine Learning on Semantic Web Data Inproceedings

In: Companion of the The Web Conference 2018 on The Web Conference 2018, WWW 2018, Lyon , France, April 23-27, 2018, pp. 467–471, ACM, 2018.

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Singh, Kuldeep; Radhakrishna, Arun Sethupat; Both, Andreas; Shekarpour, Saeedeh; Lytra, Ioanna; Usbeck, Ricardo; Vyas, Akhilesh; Khikmatullaev, Akmal; Punjani, Dharmen; Lange, Christoph; Vidal, Maria-Esther; Lehmann, Jens; Auer, Sören

Why Reinvent the Wheel: Let's Build Question Answering Systems Together Inproceedings

In: Proceedings of the 2018 World Wide Web Conference on World Wide Web, WWW 2018, Lyon, France, April 23-27, 2018, pp. 1247–1256, ACM, 2018.

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Staab, Steffen; Lehmann, Jens; Verborgh, Ruben

Structured Knowledge on the Web 7.0 Inproceedings

In: Companion of the The Web Conference 2018 on The Web Conference 2018, WWW 2018, Lyon , France, April 23-27, 2018, pp. 885–886, ACM, 2018.

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Esteves, Diego; Rula, Anisa; Reddy, Aniketh Janardhan; Lehmann, Jens

Toward Veracity Assessment in RDF Knowledge Bases: An Exploratory Analysis Journal Article

In: ACM J. Data Inf. Qual., vol. 9, no. 3, pp. 16:1–16:26, 2018.

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Ismayilov, Ali; Kontokostas, Dimitris; Auer, Sören; Lehmann, Jens; Hellmann, Sebastian

Wikidata through the eyes of DBpedia Journal Article

In: Semantic Web, vol. 9, no. 4, pp. 493–503, 2018.

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2017

Bin, Simon; Westphal, Patrick; Lehmann, Jens; Ngonga, Axel

Implementing scalable structured machine learning for big data in the SAKE project Inproceedings

In: 2017 IEEE International Conference on Big Data (IEEE BigData 2017), Boston, MA, USA, December 11-14, 2017, pp. 1400–1407, IEEE Computer Society, 2017.

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Jabeen, Hajira; Archer, Phil; Scerri, Simon; Versteden, Aad; Ermilov, Ivan; Mouchakis, Giannis; Lehmann, Jens; Auer, Sören

Big Data Europe Inproceedings

In: Proceedings of the Workshops of the EDBT/ICDT 2017 Joint Conference (EDBT/ICDT 2017), Venice, Italy, March 21-24, 2017, CEUR-WS.org, 2017.

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Sherif, Mohamed Ahmed; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

Wombat - A Generalization Approach for Automatic Link Discovery Inproceedings

In: The Semantic Web - 14th International Conference, ESWC 2017, Portorov z, Slovenia, May 28 - June 1, 2017, Proceedings, Part I, pp. 103–119, 2017.

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Stadler, Claus; Lehmann, Jens

JPA Criteria Queries over RDF Data Inproceedings

In: Joint Proceedings of the 2nd RDF Stream Processing (RSP 2017) and the Querying the Web of Data (QuWeDa 2017) Workshops co-located with 14th ESWC 2017 (ESWC 2017), Portoroz, Slovenia, May 28th - to - 29th, 2017, pp. 55–62, CEUR-WS.org, 2017.

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Petzka, Henning; Stadler, Claus; Katsimpras, Georgios; Haarmann, Bastian; Lehmann, Jens

Benchmarking Faceted Browsing Capabilities of Triplestores Inproceedings

In: Proceedings of the 13th International Conference on Semantic Systems, SEMANTiCS 2017, Amsterdam, The Netherlands, September 11-14, 2017, pp. 128–135, ACM, 2017.

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Thakkar, Harsh; Keswani, Yashwant; Dubey, Mohnish; Lehmann, Jens; Auer, Sören

Trying Not to Die Benchmarking: Orchestrating RDF and Graph Data Management Solution Benchmarks Using LITMUS Inproceedings

In: Proceedings of the 13th International Conference on Semantic Systems, SEMANTiCS 2017, Amsterdam, The Netherlands, September 11-14, 2017, pp. 120–127, ACM, 2017.

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Auer, Sören; Scerri, Simon; Versteden, Aad; Pauwels, Erika; Charalambidis, Angelos; Konstantopoulos, Stasinos; Lehmann, Jens; Jabeen, Hajira; Ermilov, Ivan; Sejdiu, Gezim; Ikonomopoulos, Andreas; Andronopoulos, Spyros; Vlachogiannis, Mandy; Pappas, Charalambos; Davettas, Athanasios; Klampanos, Iraklis A.; Grigoropoulos, Efstathios; Karkaletsis, Vangelis; Boer, Victor; Siebes, Ronald; Mami, Mohamed Nadjib; Albani, Sergio; Lazzarini, Michele; Nunes, Paulo; Angiuli, Emanuele; Pittaras, Nikiforos; Giannakopoulos, George; Argyriou, Giorgos; Stamoulis, George; Papadakis, George; Koubarakis, Manolis; Karampiperis, Pythagoras; Ngomo, Axel-Cyrille Ngonga; Vidal, Maria-Esther

The BigDataEurope Platform - Supporting the Variety Dimension of Big Data Inproceedings

In: Web Engineering - 17th International Conference, ICWE 2017, Rome, Italy, June 5-8, 2017, Proceedings, pp. 41–59, Springer, 2017.

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Saleem, Muhammad; Stadler, Claus; Mehmood, Qaiser; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

SQCFramework: SPARQL Query Containment Benchmark Generation Framework Inproceedings

In: Proceedings of the Knowledge Capture Conference, K-CAP 2017, Austin, TX, USA, December 4-6, 2017, pp. 28:1–28:8, ACM, 2017.

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Ermilov, Ivan; Ngomo, Axel-Cyrille Ngonga; Versteden, Aad; Jabeen, Hajira; Sejdiu, Gezim; Argyriou, Giorgos; Selmi, Luigi; Jakobitsch, Jürgen; Lehmann, Jens

Managing Lifecycle of Big Data Applications Inproceedings

In: Knowledge Engineering and Semantic Web - 8th International Conference, KESW 2017, Szczecin, Poland, November 8-10, 2017, Proceedings, pp. 263–276, Springer, 2017.

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Marx, Edgard; Shekarpour, Saeedeh; Soru, Tommaso; Brasoveanu, Adrian M. P.; Saleem, Muhammad; Baron, Ciro; Weichselbraun, Albert; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Auer, Sören

Torpedo: Improving the State-of-the-Art RDF Dataset Slicing Inproceedings

In: 11th IEEE International Conference on Semantic Computing, ICSC 2017, San Diego, CA, USA, January 30 - February 1, 2017, pp. 149–156, IEEE Computer Society, 2017.

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309 entries « 3 of 7 »