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 « 5 of 7 »

2015

Gerber, Daniel; Esteves, Diego; Lehmann, Jens; Bühmann, Lorenz; Usbeck, Ricardo; Ngomo, Axel-Cyrille Ngonga; Speck, René

DeFacto - Temporal and multilingual Deep Fact Validation Journal Article

In: J. Web Semant., vol. 35, pp. 85–101, 2015.

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Speck, René; Esteves, Diego; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

DeFacto - A Multilingual Fact Validation Interface Inproceedings

In: 14th International Semantic Web Conference (ISWC 2015), 11-15 October 2015, Bethlehem, Pennsylvania, USA (Semantic Web Challenge Proceedings), 2015, (Semantic Web Challenge, International Semantic Web Conference 2015).

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Lehmann, Jens; Athanasiou, Spiros; Both, Andreas; Buehmann, Lorenz; Garcia-Rojas, Alejandra; Giannopoulos, Giorgos; Hladky, Daniel; Hoeffner, Konrad; Grange, Jon Jay Le; Ngomo, Axel-Cyrille Ngonga; Pietzsch, Rene; Isele, Robert; Sherif, Mohamed Ahmed; Stadler, Claus; Wauer, Matthias; Westphal, Patrick

The GeoKnow Handbook Technical Report

2015.

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Garcia-Rojas, Alejandra; Hladky, Daniel; Wauer, Matthias; Isele, Robert; Stadler, Claus; Lehmann, Jens

The GeoKnow Generator Workbench: An Integration Platform for Geospatial Data Inproceedings

In: Proceedings of the 3rd International Workshop on Semantic Web Enterprise Adoption and Best Practice, 2015.

BibTeX

Lehmann, Jens; Athanasiou, Spiros; Both, Andreas; Garc'ia-Rojas, Alejandra; Giannopoulos, Giorgos; Hladky, Daniel; Grange, Jon Jay Le; Ngomo, Axel-Cyrille Ngonga; Sherif, Mohamed Ahmed; Stadler, Claus; Wauer, Matthias; Westphal, Patrick; Zaslawski, Vadim

Managing Geospatial Linked Data in the GeoKnow Project Incollection

In: The Semantic Web in Earth and Space Science. Current Status and Future Directions, vol. 20, pp. 51–78, IOS Press, 2015.

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2014

Bühmann, Lorenz; Fleischhacker, Daniel; Lehmann, Jens; Melo, André; Völker, Johanna

Inductive Lexical Learning of Class Expressions Inproceedings

In: Knowledge Engineering and Knowledge Management - 19th International Conference, EKAW 2014, Linköping, Sweden, November 24-28, 2014. Proceedings, pp. 42–53, Springer, 2014.

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Cherix, Didier; Usbeck, Ricardo; Both, Andreas; Lehmann, Jens

CROCUS: Cluster-based Ontology Data Cleansing Inproceedings

In: Joint Proceedings of the Second International Workshop on Semantic Web Enterprise Adoption and Best Practice and Second International Workshop on Finance and Economics on the Semantic Web Co-located with 11th European Semantic Web Conference, WaSABi-FEOSW@ESWC 2014, Anissaras, Greece, May 26, 2014, CEUR-WS.org, 2014.

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Cherix, Didier; Usbeck, Ricardo; Both, Andreas; Lehmann, Jens

Lessons Learned - The Case of CROCUS: Cluster-Based Ontology Data Cleansing Inproceedings

In: The Semantic Web: ESWC 2014 Satellite Events - ESWC 2014 Satellite Events, Anissaras, Crete, Greece, May 25-29, 2014, Revised Selected Papers, pp. 14–24, Springer, 2014.

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Kontokostas, Dimitris; Brümmer, Martin; Hellmann, Sebastian; Lehmann, Jens; Ioannidis, Lazaros

NLP Data Cleansing Based on Linguistic Ontology Constraints Inproceedings

In: The Semantic Web: Trends and Challenges - 11th International Conference, ESWC 2014, Anissaras, Crete, Greece, May 25-29, 2014. Proceedings, pp. 224–239, Springer, 2014.

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Rula, Anisa; Palmonari, Matteo; Ngomo, Axel-Cyrille Ngonga; Gerber, Daniel; Lehmann, Jens; Bühmann, Lorenz

Hybrid Acquisition of Temporal Scopes for RDF Data Inproceedings

In: The Semantic Web: Trends and Challenges - 11th International Conference, ESWC 2014, Anissaras, Crete, Greece, May 25-29, 2014. Proceedings, pp. 488–503, Springer, 2014.

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Höffner, Konrad; Lehmann, Jens

Towards question answering on statistical linked data Inproceedings

In: Proceedings of the 10th International Conference on Semantic Systems, SEMANTiCS 2014, Leipzig, Germany, September 4-5, 2014, pp. 61–64, ACM, 2014.

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Lukovnikov, Denis; Stadler, Claus; Lehmann, Jens

LD viewer - linked data presentation framework Inproceedings

In: Proceedings of the 10th International Conference on Semantic Systems, SEMANTiCS 2014, Leipzig, Germany, September 4-5, 2014, pp. 124–131, ACM, 2014.

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Marx, Edgard; Usbeck, Ricardo; Ngomo, Axel-Cyrille Ngonga; Höffner, Konrad; Lehmann, Jens; Auer, Sören

Towards an open question answering architecture Inproceedings

In: Proceedings of the 10th International Conference on Semantic Systems, SEMANTiCS 2014, Leipzig, Germany, September 4-5, 2014, pp. 57–60, ACM, 2014.

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Badie, Farshad; Soru, Tommaso; Lehmann, Jens

A Fuzzy Knowledge Representation Model for Student Performance Assessment Inproceedings

In: IEEE 14th International Conference on Advanced Learning Technologies, ICALT 2014, Athens, Greece, July 7-10, 2014, pp. 539–540, IEEE Computer Society, 2014.

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Sherif, Mohamed Ahmed; Coelho, Sandro; Usbeck, Ricardo; Hellmann, Sebastian; Lehmann, Jens; Brümmer, Martin; Both, Andreas

NIF4OGGD - NLP Interchange Format for Open German Governmental Data Inproceedings

In: Proceedings of the Ninth International Conference on Language Resources and Evaluation, LREC 2014, Reykjavik, Iceland, May 26-31, 2014, pp. 3524–3528, European Language Resources Association (ELRA), 2014.

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Auer, Sören; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

Introduction to Linked Data and Its Lifecycle on the Web Inproceedings

In: Reasoning Web. Semantic Technologies for the Web of Data - 7th International Summer School 2011, Galway, Ireland, August 23-27, 2011, Tutorial Lectures, pp. 1–75, Springer, 2014.

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Stadler, Claus; Westphal, Patrick; Lehmann, Jens

Jassa - A JavaScript suite for SPARQL-based faceted search Inproceedings

In: Proceedings of the ISWC Developers Workshop 2014, co-located with the 13th International Semantic Web Conference (ISWC 2014), Riva del Garda, Italy, October 19, 2014, pp. 31–36, CEUR-WS.org, 2014.

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Pokharel, Suresh; Sherif, Mohamed Ahmed; Lehmann, Jens

Ontology Based Data Access and Integration for Improving the Effectiveness of Farming in Nepal Inproceedings

In: 2014 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT), Warsaw, Poland, August 11-14, 2014 - Volume I, pp. 319–326, IEEE Computer Society, 2014.

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Kontokostas, Dimitris; Westphal, Patrick; Auer, Sören; Hellmann, Sebastian; Lehmann, Jens; Cornelissen, Roland

Databugger: a test-driven framework for debugging the web of data Inproceedings

In: 23rd International World Wide Web Conference, WWW '14, Seoul, Republic of Korea, April 7-11, 2014, Companion Volume, pp. 115–118, ACM, 2014.

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Kontokostas, Dimitris; Westphal, Patrick; Auer, Sören; Hellmann, Sebastian; Lehmann, Jens; Cornelissen, Roland; Zaveri, Amrapali

Test-driven evaluation of linked data quality Inproceedings

In: 23rd International World Wide Web Conference, WWW '14, Seoul, Republic of Korea, April 7-11, 2014, pp. 747–758, ACM, 2014.

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Lukovnikov, Denis; Kontokostas, Dimitris; Stadler, Claus; Hellmann, Sebastian; Lehmann, Jens

DBpedia Viewer - An Integrative Interface for DBpedia leveraging the DBpedia Service Eco System Inproceedings

In: Proceedings of the Workshop on Linked Data on the Web co-located with the 23rd International World Wide Web Conference (WWW 2014), Seoul, Korea, April 8, 2014, CEUR-WS.org, 2014.

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Athanasiou, Spiros; Hladky, Daniel; Giannopoulos, Giorgos; Garc'ia-Rojas, Alejandra; Lehmann, Jens

GeoKnow: Making the Web an Exploratory Place for Geospatial Knowledge Journal Article

In: ERCIM News, vol. 2014, no. 96, 2014.

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Dirschl, Christian; Eck, Katja; Lehmann, Jens

Supporting the Data Lifecycle at a Global Publisher using the Linked Data Stack Journal Article

In: ERCIM News, vol. 2014, no. 96, 2014.

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Martin, Michael; Stadler, Claus; Frischmuth, Philipp; Lehmann, Jens

Increasing the financial transparency of European Commission project funding Journal Article

In: Semantic Web, vol. 5, no. 2, pp. 157–164, 2014.

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Hitzler, Pascal; Lehmann, Jens; Polleres, Axel

Logics for the Semantic Web Incollection

In: Computational Logic, vol. 9, pp. 679–710, Elsevier, 2014.

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Hellmann, Sebastian; Bryl, Volha; Bühmann, Lorenz; Dojchinovski, Milan; Kontokostas, Dimitris; Lehmann, Jens; Milosevic, Uros; Petrovski, Petar; Svátek, Vojtech; Stanojevic, Mladen; Zamazal, Ondrej

Knowledge Base Creation, Enrichment and Repair Incollection

In: Linked Open Data - Creating Knowledge Out of Interlinked Data - Results of the LOD2 Project, vol. 8661, pp. 45–69, Springer, 2014.

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Lehmann, Jens; Völker, Johanna

Perspectives on Ontology Learning Book

IOS Press, 2014, ISBN: 978-1-61499-378-0.

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Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga

The GeoKnow Project Proceeding

2014.

BibTeX

Lehmann, Jens; Bühmann, Lorenz

Linked Data Reasoning Incollection

In: Linked Enterprise Data, X.media press, 2014.

BibTeX

Grange, Jon Jay Le; Lehmann, Jens; Athanasiou, Spiros; Rojas, Alejandra Garcia; Giannopoulos, Giorgos; Hladky, Daniel; Isele, Robert; Ngomo, Axel-Cyrille Ngonga; Sherif, Mohamed Ahmed; Stadler, Claus; Wauer, Matthias

The GeoKnow Generator: Managing Geospatial Data in the Linked Data Web Inproceedings

In: Proceedings of the Linking Geospatial Data Workshop, 2014.

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Lehmann, Jens; Fanizzi, Nicola; Bühmann, Lorenz; dÁmato, Claudia

Concept Learning Incollection

In: Perspectives on Ontology Learning, pp. 71-91, AKA / IOS Press, 2014.

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Lehmann, Jens; Voelker, Johanna

An Introduction to Ontology Learning Incollection

In: Perspectives on Ontology Learning, pp. ix-xvi, AKA / IOS Press, 2014.

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Jentzsch, Anja; Usbeck, Ricardo; Vrandecic, Denny

An Incomplete and Simplifying Introduction to Linked Data Incollection

In: Perspectives on Ontology Learning, pp. 21–33, AKA / IOS Press, 2014.

BibTeX

Westphal, Patrick; Stadler, Claus; Lehmann, Jens

Quality Assurance of RDB2RDF Mappings Technical Report

2014.

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2013

Auer, Sören; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Stadler, Claus; Unbehauen, Jörg

Extraktion, Mapping und Verlinkung von Daten im Web Journal Article

In: Datenbank Spektrum, vol. 13, no. 2, pp. 77-87, 2013.

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Lyko, Klaus; Höffner, Konrad; Speck, René; Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens

SAIM - One Step Closer to Zero-Configuration Link Discovery Inproceedings

In: The Semantic Web: ESWC 2013 Satellite Events - ESWC 2013 Satellite Events, Montpellier, France, May 26-30, 2013, Revised Selected Papers, pp. 167–172, Springer, 2013.

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Zaveri, Amrapali; Nowick, Katja; Lehmann, Jens

Towards Biomedical Data Integration for Analyzing the Evolution of Cognition Inproceedings

In: 43. Jahrestagung der Gesellschaft für Informatik, Informatik angepasst an Mensch, Organisation und Umwelt, INFORMATIK 2013, Koblenz, Germany, September 16-20, 2013, pp. 1900–1907, GI, 2013.

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Zaveri, Amrapali; Kontokostas, Dimitris; Sherif, Mohamed Ahmed; Bühmann, Lorenz; Morsey, Mohamed; Auer, Sören; Lehmann, Jens

User-driven quality evaluation of DBpedia Inproceedings

In: I-SEMANTICS 2013 - 9th International Conference on Semantic Systems, ISEM '13, Graz, Austria, September 4-6, 2013, pp. 97–104, ACM, 2013.

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Ermilov, Ivan; Martin, Michael; Lehmann, Jens; Auer, Sören

Linked Open Data Statistics: Collection and Exploitation Inproceedings

In: Knowledge Engineering and the Semantic Web - 4th International Conference, KESW 2013, St. Petersburg, Russia, October 7-9, 2013. Proceedings, pp. 242–249, Springer, 2013.

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Höffner, Konrad; Unger, Christina; Bühmann, Lorenz; Lehmann, Jens; Ngomo, Axel-Cyrille Ngonga; Gerber, Daniel; Cimiano, Philipp

User Interface for a Template Based Question Answering System Inproceedings

In: Knowledge Engineering and the Semantic Web - 4th International Conference, KESW 2013, St. Petersburg, Russia, October 7-9, 2013. Proceedings, pp. 258–264, Springer, 2013.

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Kontokostas, Dimitris; Zaveri, Amrapali; Auer, Sören; Lehmann, Jens

TripleCheckMate: A Tool for Crowdsourcing the Quality Assessment of Linked Data Inproceedings

In: Knowledge Engineering and the Semantic Web - 4th International Conference, KESW 2013, St. Petersburg, Russia, October 7-9, 2013. Proceedings, pp. 265–272, Springer, 2013.

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Lehmann, Jens; Nguyen, Tri Quan; Ermilov, Timofey

Can We Create Better Links by Playing Games? Inproceedings

In: 2013 IEEE Seventh International Conference on Semantic Computing, Irvine, CA, USA, September 16-18, 2013, pp. 322–329, IEEE Computer Society, 2013.

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Ngomo, Axel-Cyrille Ngonga; Lehmann, Jens; Hassan, Mofeed Mohamed

Towards Transfer Learning of Link Specifications Inproceedings

In: 2013 IEEE Seventh International Conference on Semantic Computing, Irvine, CA, USA, September 16-18, 2013, pp. 202–205, IEEE Computer Society, 2013.

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Shekarpour, Saeedeh; Höffner, Konrad; Lehmann, Jens; Auer, Sören

Keyword Query Expansion on Linked Data Using Linguistic and Semantic Features Inproceedings

In: 2013 IEEE Seventh International Conference on Semantic Computing, Irvine, CA, USA, September 16-18, 2013, pp. 191–197, IEEE Computer Society, 2013.

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Acosta, Maribel; Zaveri, Amrapali; Simperl, Elena; Kontokostas, Dimitris; Auer, Sören; Lehmann, Jens

Crowdsourcing Linked Data Quality Assessment Inproceedings

In: The Semantic Web - ISWC 2013 - 12th International Semantic Web Conference, Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part II, pp. 260–276, Springer, 2013.

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Bühmann, Lorenz; Lehmann, Jens

Pattern Based Knowledge Base Enrichment Inproceedings

In: The Semantic Web - ISWC 2013 - 12th International Semantic Web Conference, Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part I, pp. 33–48, Springer, 2013.

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Hellmann, Sebastian; Lehmann, Jens; Auer, Sören; Brümmer, Martin

Integrating NLP Using Linked Data Inproceedings

In: The Semantic Web - ISWC 2013 - 12th International Semantic Web Conference, Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part II, pp. 98–113, Springer, 2013.

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Ngomo, Axel-Cyrille Ngonga; Bühmann, Lorenz; Unger, Christina; Lehmann, Jens; Gerber, Daniel

Sorry, i don't speak SPARQL: translating SPARQL queries into natural language Inproceedings

In: 22nd International World Wide Web Conference, WWW '13, Rio de Janeiro, Brazil, May 13-17, 2013, pp. 977–988, International World Wide Web Conferences Steering Committee / ACM, 2013.

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Ngomo, Axel-Cyrille Ngonga; Bühmann, Lorenz; Unger, Christina; Lehmann, Jens; Gerber, Daniel

SPARQL2NL: verbalizing sparql queries Inproceedings

In: 22nd International World Wide Web Conference, WWW '13, Rio de Janeiro, Brazil, May 13-17, 2013, Companion Volume, pp. 329–332, International World Wide Web Conferences Steering Committee / ACM, 2013.

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Garcia-Rojas, Alejandra; Athanasiou, Spiros; Lehmann, Jens; Hladky, Daniel

GeoKnow: Leveraging Geospatial Data in the Web of Data Inproceedings

In: Open Data on the Web Workshop, 2013.

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309 entries « 5 of 7 »