Prof. Dr. Jens Lehmann

Full Professor
Computer Science Institute
University of Bonn

Lead Scientist & Coordinator of Dresden Branch
NetMedia Department
Fraunhofer IAIS

Member of Institute for Applied Informatics, Dresden / Leipzig

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

Offices

Room 1.022
Endenicher Allee 19a, 53115 Bonn, Germany
University of Bonn, Computer Science
Tel:+49 228 73-4315

Zwickauer Straße 46
01069 Dresden, Germany
Fraunhofer IAIS

Short CV


Prof. Dr. Jens Lehmann (http://www.jens-lehmann.org) leads the „Smart Data Analytics“ research group at the University of Bonn and Fraunhofer IAIS with approximately 40 researchers and is lead scientist at Fraunhofer IAIS in the Enterprise Information Systems department. His research interests involve Semantic Web, machine learning, question answering & dialogue systems, distributed computing and knowledge representation. Prof. Lehmann authored more than 120 articles in international journals and conferences, 50 of those in A level venues winning 12 best paper awards. His articles are cited more than 20000 times. In several major conferences and journals, he has leading positions. He is founder, leader or contributor of several community research projects, including SANSA, AskNow, DL-Learner, DBpedia and LinkedGeoData. Previously, he completed his PhD with „summa cum laude“ at the University of Leipzig with visits to the University of Oxford.

Research Interests


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

Publications


284 entries « 2 of 6 »

2019

Sejdiu, Gezim; Graux, Damien; Khan, Imran; Lytra, Ioanna; Jabeen, Hajira; Lehmann, Jens

Towards a Scalable Semantic-Based Distributed Approach for SPARQL Query Evaluation Inproceedings

In: Semantic Systems. The Power of AI and Knowledge Graphs - 15th International Conference, SEMANTiCS 2019, Karlsruhe, Germany, September 9-12, 2019, Proceedings, pp. 295–309, Springer, 2019.

Links | BibTeX

Abdelkawi, Abdelrahman; Zafar, Hamid; Maleshkova, Maria; Lehmann, Jens

Complex Query Augmentation for Question Answering over Knowledge Graphs Inproceedings

In: On the Move to Meaningful Internet Systems: OTM 2019 Conferences - Confederated International Conferences: CoopIS, ODBASE, C&TC 2019, Rhodes, Greece, October 21-25, 2019, Proceedings, pp. 571–587, Springer, 2019.

Links | BibTeX

Stadler, Claus; Sejdiu, Gezim; Graux, Damien; Lehmann, Jens

Querying Large-scale RDF Datasets Using the SANSA Framework 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. 285–288, CEUR-WS.org, 2019.

Links | BibTeX

Stadler, Claus; Sejdiu, Gezim; Graux, Damien; Lehmann, Jens

Sparklify: A Scalable Software Component for Efficient Evaluation of SPARQL Queries over Distributed 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. 293–308, Springer, 2019.

Links | BibTeX

Garcia, Lu'is Paulo F.; Lehmann, Jens; de Carvalho, André C. P. L. F.; Lorena, Ana Carolina

New label noise injection methods for the evaluation of noise filters Journal Article

In: Knowl. Based Syst., vol. 163, pp. 693–704, 2019.

Links | BibTeX

Athanasiou, Spiros; Giannopoulos, Giorgos; Graux, Damien; Karagiannakis, Nikos; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Patroumpas, Kostas; Sherif, Mohamed Ahmed; Skoutas, Dimitrios

Big POI data integration with Linked Data technologies Inproceedings

In: Advances in Database Technology - 22nd International Conference on Extending Database Technology, EDBT 2019, Lisbon, Portugal, March 26-29, 2019, pp. 477–488, OpenProceedings.org, 2019.

Links | BibTeX

Rahimbayli, Sattar; Lehmann, Jens; Deserno, Thomas M.

Pay for Performance in Electronic Data Capture for Clinical Trials and Medical Registries Inproceedings

In: ICT for Health Science Research - Proceedings of the EFMI 2019 Special Topic Conference - 7-10 April 2019, Hanover, Germany, pp. 221–225, IOS Press, 2019.

Links | BibTeX

Chawla, Piyush; Esteves, Diego; Pujar, Karthik; Lehmann, Jens

SimpleLSTM: A Deep-Learning Approach to Simple-Claims Classification Inproceedings

In: Progress in Artificial Intelligence, 19th EPIA Conference on Artificial Intelligence, EPIA 2019, Vila Real, Portugal, September 3-6, 2019, Proceedings, Part II, pp. 244–255, Springer, 2019.

Links | BibTeX

Ibrahim, Shimaa; Fathalla, Said; Yazdi, Hamed Shariat; Lehmann, Jens; Jabeen, Hajira

OECM: A Cross-Lingual Approach for Ontology Enrichment Inproceedings

In: The Semantic Web: ESWC 2019 Satellite Events - ESWC 2019 Satellite Events, Portorov z, Slovenia, June 2-6, 2019, Revised Selected Papers, pp. 100–104, Springer, 2019.

Links | BibTeX

Jabeen, Hajira; Tahara, Nargis; Lehmann, Jens

EvoChef: Show Me What to Cook! Artificial Evolution of Culinary Arts Inproceedings

In: Computational Intelligence in Music, Sound, Art and Design - 8th International Conference, EvoMUSART 2019, Held as Part of EvoStar 2019, Leipzig, Germany, April 24-26, 2019, Proceedings, pp. 156–172, Springer, 2019.

Links | BibTeX

Ibrahim, Shimaa; Fathalla, Said; Yazdi, Hamed Shariat; Lehmann, Jens; Jabeen, Hajira

From Monolingual to Multilingual Ontologies: The Role of Cross-Lingual Ontology Enrichment Inproceedings

In: Semantic Systems. The Power of AI and Knowledge Graphs - 15th International Conference, SEMANTiCS 2019, Karlsruhe, Germany, September 9-12, 2019, Proceedings, pp. 215–230, Springer, 2019.

Links | BibTeX

Sui, Danning; Sejdiu, Gezim; Graux, Damien; Lehmann, Jens

The Hubs and Authorities Transaction Network Analysis using the SANSA framework Inproceedings

In: Proceedings of the Posters and Demo Track of the 15th International Conference on Semantic Systems co-located with 15th International Conference on Semantic Systems (SEMANTiCS 2019), Karlsruhe, Germany, September 9th - to - 12th, 2019, CEUR-WS.org, 2019.

Links | BibTeX

Maqbool, Fahad; Razzaq, Saad; Lehmann, Jens; Jabeen, Hajira

Scalable Distributed Genetic Algorithm Using Apache Spark (S-GA) Inproceedings

In: Intelligent Computing Theories and Application - 15th International Conference, ICIC 2019, Nanchang, China, August 3-6, 2019, Proceedings, Part I, pp. 424–435, Springer, 2019.

Links | BibTeX

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

Uniform Access to Multiform Data Lakes using Semantic Technologies Inproceedings

In: Proceedings of the 21st International Conference on Information Integration and Web-based Applications & Services, iiWAS 2019, Munich, Germany, December 2-4, 2019, pp. 313–322, ACM, 2019.

Links | BibTeX

Sakor, Ahmad; Mulang, Isaiah Onando; Singh, Kuldeep; Shekarpour, Saeedeh; Vidal, Maria-Esther; Lehmann, Jens; Auer, Sören

Old is Gold: Linguistic Driven Approach for Entity and Relation Linking of Short Text Inproceedings

In: Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, NAACL-HLT 2019, Minneapolis, MN, USA, June 2-7, 2019, Volume 1 (Long and Short Papers), pp. 2336–2346, Association for Computational Linguistics, 2019.

Links | BibTeX

Ali, Mehdi; Vahdati, Sahar; Singh, Shruti; Dasgupta, Sourish; Lehmann, Jens

Improving Access to Science for Social Good Inproceedings

In: Machine Learning and Knowledge Discovery in Databases - International Workshops of ECML PKDD 2019, Würzburg, Germany, September 16-20, 2019, Proceedings, Part I, pp. 658–673, Springer, 2019.

Links | BibTeX

Sadeghi, Afshin; Lehmann, Jens

Linking Physicians to Medical Research Results via Knowledge Graph Embeddings and Twitter Inproceedings

In: Machine Learning and Knowledge Discovery in Databases - International Workshops of ECML PKDD 2019, Würzburg, Germany, September 16-20, 2019, Proceedings, Part I, pp. 622–630, Springer, 2019.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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

LC-QAD 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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

Lorena, Ana Carolina; Garcia, Lu'is Paulo F.; Lehmann, Jens; de 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.

Links | BibTeX

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.

Links | BibTeX

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. 72–86, 2019.

Links | BibTeX

Petersohn, Uwe; Zimmer, Sandra; Lehmann, Jens

Method for the semantic indexing of concept hierarchies, uniform representation, use of relational database systems and generic and case-based reasoning Journal Article

In: CoRR, vol. abs/1910.01539, 2019.

Links | BibTeX

2018

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

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.

Links | BibTeX

284 entries « 2 of 6 »