Question Answering
Question answering is the area of computer science concerned with
automatically answering questions posed by humans in natural language.
In our research, we investigate closed domain question answering against
a local knowledge graph. More specifically, we convert natural language
queries to SPARQL queries, which can then be processed and the answers
returned to the user.
For achieving this goal, we research two approaches. First, we
investigate the analysis of questions via principles of computer
linguistics. In that case, there is usually a pipeline of processing
steps sequentially transforming the input question until a SPARQL query
is obtained. The second line of research we are pursuing are end-to-end
question answering systems directly transforming an input question into
a SPARQL query. Those systems rely on machine learning methods, e.g.
neural networks, and the availability of (usually large amounts of)
training data.
Journal Publications
Conference Publications
- "A Question Answering System on Regulatory Documents"
Diego Collarana, Timm Heuss, Jens Lehmann, Ioanna Lytra, Gaurav Maheshwari, Rostislav Nedelchev, Thorsten Schmidt, Priyansh Trivedi
In: Proceedings of the 31st international conference on Legal Knowledge and Information Systems (JURIX), 2018
- "EARL: Joint Entity and Relation Linking for Question Answering over Knowledge Graphs"
Mohnish Dubey, Debayan Banerjee, Debanjan Chaudhuri, Jens Lehmann
In: Proceedings of the 17th International Semantic Web Conference (ISWC), 2018
- "Deep Query Ranking for Question Answering over Knowledge Bases"
Hamid Zafar, Giulio Napolitano, Jens Lehmann
In: Proceedings of the 29th European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD), 2018
- "Why Reinvent the Wheel: Let's Build Question Answering Systems Together"
Kuldeep Singh, Arun Sethupat Radhakrishna, Andreas Both, Saeedeh Shekarpour, Ioanna Lytra, Ricardo Usbeck, Akhilesh Vyas, Akmal Khikmatullaev, Dharmen Punjani, Christoph Lange, Maria-Esther Vidal, Jens Lehmann, Sören Auer
In: Proceedings of the 27th World Wide Web Conference (WWW), ACM, 2018
- "Formal Query Generation for Question Answering over Knowledge Bases"
Hamid Zafar, Giulio Napolitano, Jens Lehmann
In: Proceedings of the 15th Extended Semantic Web Conference (ESWC), 2018
- "Named Entity Recognition in Twitter using Images and Text"
Diego Esteves, Rafael Peres, Jens Lehmann, Giulio Napolitano
In: Proceedings of the 3rd International Workshop on Natural Language Processing for Informal Text, 2017
- "A Corpus for Complex Question Answering over Knowledge Graphs"
Priyansh Trivedi, Gaurav Maheshwari, Mohnish Dubey, Jens Lehmann
In: Proceedings of the 16th International Semantic Web Conference (ISWC), Springer, 2017
- download:
PDF (315.5 KB) - formats:
BibTeX,
RDF - related info pages: Question Answering
- Nominated for ISWC Best Student Resource Paper and Winner of Fraunhofer IAIS Paper of the Month November 2017
- "Dialogue Response Generation using Neural Networks with Attention and Background Knowledge"
Sofiia Kosovan, Jens Lehmann, Asja Fischer
In: Proceedings of the Computer Science Conference for University of Bonn Students (CSCUBS) 2017, 2017
- "Neural Network-based Question Answering over Knowledge Graphs on Word and Character Level"
Denis Lukovnikov, Asja Fischer, Sören Auer, Jens Lehmann
In: Proceedings of the 26th international conference on World Wide Web, ACM, 2017
- "Exploring Term Networks for Semantic Search over RDF Knowledge Graphs"
Edgard Marx, Konrad Höffner, Saeedeh Shekarpour, Axel-Cyrille Ngonga Ngomo, Jens Lehmann, Sören Auer
In: Emmanouel Garoufallou, Imma Subirats Coll, Armando Stellato, Jane Greenberg (editors), Proceedings of the 10th International Conference on Metadata and Semantics Research (MTSR), 2016
- "CubeQA - Question Answering on RDF Data Cubes"
Konrad Höffner, Jens Lehmann, Ricardo Usbeck
In: Proceedings of the 15th International Semantic Web Conference (ISWC), Springer, 2016
- "AskNow: A Framework for Natural Language Query Formalization in SPARQL"
Mohnish Dubey, Sourish Dasgupta, Ankit Sharma, Konrad Höffner, Jens Lehmann
In: Proc. of the Extended Semantic Web Conference 2016, Springer, 2016
- "Towards an Open Question Answering Architecture"
Edgard Marx, Ricardo Usbeck, Axel-Cyrille Ngonga Ngomo, Konrad Höffner, Jens Lehmann, Sören Auer
In: Proceedings of the 10th SEMANTiCs - Transfer, Engineering, Community (SEMANTiCs), 2014
- "Towards Question Answering on Statistical Linked Data"
Konrad Höffner, Jens Lehmann
In: Proceedings of the 10th SEMANTiCs - Transfer, Engineering, Community (SEMANTiCs), ACM, 2014
- "TBSL Question Answering System Demo"
Konrad Höffner, Christina Unger, Lorenz Bühmann, Jens Lehmann, Axel-Cyrille Ngonga Ngomo, Daniel Gerber, Philipp Cimiano
In: Proceedings of the 4th Conference on Knowledge Engineering and Semantic Web (KESW), Springer, 2013
- "DEQA: Deep Web Extraction for Question Answering"
Jens Lehmann, Tim Furche, Giovanni Grasso, Axel-Cyrille Ngonga Ngomo, Christian Schallhart, Andrew Sellers, Christina Unger, Lorenz Bühmann, Daniel Gerber, Konrad Höffner
In: Proceedings of the 11st International Semantic Web Conference (ISWC), Lecture Notes in Computer Science , volume 7650, pages 131-147, Springer, 2012
- "Template-based question answering over RDF data"
Christina Unger, Lorenz Bühmann, Jens Lehmann, Axel-Cyrille Ngonga Ngomo, Philipp Cimiano, Daniel Gerber
In: Proceedings of the 21st International World Wide Web Conference, pages 639--648, ACM, 2012
- "AutoSPARQL: Let Users Query Your Knowledge Base"
Jens Lehmann, Lorenz Bühmann
In: Proceedings of ESWC 2011, 2011
Poster Articles
- "How to Revert Question Answering on Knowledge Graphs"
Gaurav Maheshwari, Mohnish Dubey, Priyansh Trivedi, Jens Lehmann
At: 13th International Conference on Semantic Systems (Semantics), Springer, 2017
- "An Open Question Answering Framework"
Edgard Marx, Tommaso Soru, Diego Esteves, Axel-Cyrille Ngonga Ngomo, Jens Lehmann
At: The 14th International Semantic Web Conference, Posters & Demonstrations Track, CEUR-WS.org, 2015
Demos
- "Joint Entity and Relation Linking using EARL"
Debayan Banerjee, Mohnish Dubey, Debanjan Chaudhuri, Jens Lehmann
In: ISWC 2018 Poster and Demos, 2018
- "SPARQL2NL - Verbalizing SPARQL queries"
Axel-Cyrille Ngonga Ngomo, Lorenz Bühmann, Christina Unger, Jens Lehmann, Daniel Gerber
In: Proc. of WWW 2013 Demos, ACM, 2013
Unpublished Manuscripts
Presentations
- "How to build a Question Answering system overnight"
Andreas Both, Denis Lukovnikov, Gaurav Maheshwari, Ioanna Lytra, Jens Lehmann, Kuldeep Singh, Mohnish Dubey, Priyansh Trivedi
15th Extended Semantic Web Conference, 2018