Prof. Dr. Jens Lehmann

Full Professor

Computer Science Institute, University of Bonn
Lead Scientist for Knowledge Graphs and Conversational AI at Fraunhofer IAIS
Coordination of the Dresden Lab of Fraunhofer IAIS
Member of Institute for Applied Informatics (InfAI) in Dresden & Leipzig

Prof. Dr. Jens Lehmann leads the Smart Data Analytics research group at the University of Bonn, Fraunhofer IAIS and InfAI with approximately 40 researchers. He is a lead scientist at Fraunhofer IAIS and coordinates the Dresden branch of the institute. His research interests involve knowledge graphs, machine learning as well as question answering & dialogue systems. His main research goal is to investigate and build intelligent systems by combining knowledge- and data-driven approaches. Prof. Lehmann authored more than 150 articles in international journals and conferences winning 12 best paper awards (at the point of writing). He is a supporter and contributor of 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.

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Offices

Uni Bonn

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

Fraunhofer IAIS

Room 4.33.6
Zwickauer Straße 46, 01069 Dresden, Germany
Fraunhofer IAIS
Tel: +49 351 854 77 950

InfAI

Jens Lehmann c/o Nadine Jochimsen
Institut für Angewandte Informatik (InfAI)
Goerdelerring 9
04109 Leipzig

Top Publications

Nayyeri, Mojtaba; Vahdati, Sahar; Aykul, Can; Lehmann, Jens

5* Knowledge Graph Embeddings with Projective Transformations Inproceedings

In: Thirty-Fifth AAAI Conference on Artificial Intelligence, AAAI 2021, Thirty-Third Conference on Innovative Applications of Artificial Intelligence, IAAI 2021, The Eleventh Symposium on Educational Advances in Artificial Intelligence, EAAI 2021, Virtual Event, February 2-9, 2021, pp. 9064–9072, AAAI Press, 2021.

BibTeX | Research Area: Representation Learning in Knowledge Graphs | Links:

Galkin, Mikhail; Trivedi, Priyansh; Maheshwari, Gaurav; Usbeck, Ricardo; Lehmann, Jens

Message Passing for Hyper-Relational Knowledge Graphs Inproceedings

In: Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing, EMNLP 2020, Online, November 16-20, 2020, pp. 7346–7359, Association for Computational Linguistics, 2020.

BibTeX | Research Area: Representation Learning in Knowledge Graphs | Links:

Lukovnikov, Denis; Fischer, Asja; Lehmann, Jens; Auer, Sören

Neural Network-based Question Answering over Knowledge Graphs on Word and Character Level Inproceedings

In: Proceedings of the 26th International Conference on World Wide Web, WWW 2017, Perth, Australia, April 3-7, 2017, pp. 1211–1220, ACM, 2017.

BibTeX | Research Area: Question Answering over Knowledge Graphs | Links:

Lehmann, Jens; Isele, Robert; Jakob, Max; Jentzsch, Anja; Kontokostas, Dimitris; Mendes, Pablo N.; Hellmann, Sebastian; Morsey, Mohamed; Kleef, Patrick van; Auer, Sören; Bizer, Christian

DBpedia - A large-scale, multilingual knowledge base extracted from Wikipedia Journal Article

In: Semantic Web, 6 (2), pp. 167–195, 2015.

BibTeX | Research Area: Knowledge Extraction | Links:

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

Template-based question answering over RDF data Inproceedings

In: Proceedings of the 21st World Wide Web Conference 2012, WWW 2012, Lyon, France, April 16-20, 2012, pp. 639–648, ACM, 2012.

BibTeX | Research Area: Question Answering over Knowledge Graphs | Links:

Lehmann, Jens; Gerber, Daniel; Morsey, Mohamed; Ngomo, Axel-Cyrille Ngonga

DeFacto - Deep Fact Validation Inproceedings

In: The Semantic Web - ISWC 2012 - 11th International Semantic Web Conference, Boston, MA, USA, November 11-15, 2012, Proceedings, Part I, pp. 312–327, Springer, 2012.

BibTeX | Links:

Stadler, Claus; Lehmann, Jens; Höffner, Konrad; Auer, Sören

LinkedGeoData: A core for a web of spatial open data Journal Article

In: Semantic Web, 3 (4), pp. 333–354, 2012.

BibTeX | Research Area: Spatial Data in the Semantic Web | Links:

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

DBpedia SPARQL Benchmark - Performance Assessment with Real Queries on Real Data Inproceedings

In: The Semantic Web - ISWC 2011 - 10th International Semantic Web Conference, Bonn, Germany, October 23-27, 2011, Proceedings, Part I, pp. 454–469, Springer, 2011.

BibTeX | Links:

Lehmann, Jens; Hitzler, Pascal

Concept learning in description logics using refinement operators Journal Article

In: Mach. Learn., 78 (1-2), pp. 203–250, 2010, (Based on two ILP Best Paper Awards, 164 citations).

BibTeX | Research Area: Concept Learning in Description Logics | Links:

Lehmann, Jens

DL-Learner: Learning Concepts in Description Logics Journal Article

In: J. Mach. Learn. Res., 10 , pp. 2639–2642, 2009.

BibTeX | Research Area: Concept Learning in Description Logics | Links:

Bizer, Christian; Lehmann, Jens; Kobilarov, Georgi; Auer, Sören; Becker, Christian; Cyganiak, Richard; Hellmann, Sebastian

DBpedia - A crystallization point for the Web of Data Journal Article

In: J. Web Semant., 7 (3), pp. 154–165, 2009.

BibTeX | Research Area: Knowledge Extraction | Links:

Auer, Sören; Bizer, Christian; Kobilarov, Georgi; Lehmann, Jens; Cyganiak, Richard; Ives, Zachary G.

DBpedia: A Nucleus for a Web of Open Data Inproceedings

In: The Semantic Web, 6th International Semantic Web Conference, 2nd Asian Semantic Web Conference, ISWC 2007 + ASWC 2007, Busan, Korea, November 11-15, 2007, pp. 722–735, Springer, 2007.

BibTeX | Research Area: Knowledge Extraction | Links:

Auer, Sören; Lehmann, Jens

What Have Innsbruck and Leipzig in Common? Extracting Semantics from Wiki Content Inproceedings

In: The Semantic Web: Research and Applications, 4th European Semantic Web Conference, ESWC 2007, Innsbruck, Austria, June 3-7, 2007, Proceedings, pp. 503–517, Springer, 2007.

BibTeX | Research Area: Knowledge Extraction | Links:

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