Semantic Parsing for Conversational Question Answering over Knowledge Graphs

Laura Perez-Beltrachini, Parag Jain, Emilio Monti, Mirella Lapata


Abstract
In this paper, we are interested in developing semantic parsers which understand natural language questions embedded in a conversation with a user and ground them to formal queries over definitions in a general purpose knowledge graph (KG) with very large vocabularies (covering thousands of concept names and relations, and millions of entities). To this end, we develop a dataset where user questions are annotated with Sparql parses and system answers correspond to execution results thereof. We present two different semantic parsing approaches and highlight the challenges of the task: dealing with large vocabularies, modelling conversation context, predicting queries with multiple entities, and generalising to new questions at test time. We hope our dataset will serve as useful testbed for the development of conversational semantic parsers. Our dataset and models are released at https://github.com/EdinburghNLP/SPICE.
Anthology ID:
2023.eacl-main.184
Volume:
Proceedings of the 17th Conference of the European Chapter of the Association for Computational Linguistics
Month:
May
Year:
2023
Address:
Dubrovnik, Croatia
Editors:
Andreas Vlachos, Isabelle Augenstein
Venue:
EACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
2507–2522
Language:
URL:
https://aclanthology.org/2023.eacl-main.184
DOI:
10.18653/v1/2023.eacl-main.184
Bibkey:
Cite (ACL):
Laura Perez-Beltrachini, Parag Jain, Emilio Monti, and Mirella Lapata. 2023. Semantic Parsing for Conversational Question Answering over Knowledge Graphs. In Proceedings of the 17th Conference of the European Chapter of the Association for Computational Linguistics, pages 2507–2522, Dubrovnik, Croatia. Association for Computational Linguistics.
Cite (Informal):
Semantic Parsing for Conversational Question Answering over Knowledge Graphs (Perez-Beltrachini et al., EACL 2023)
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PDF:
https://aclanthology.org/2023.eacl-main.184.pdf
Video:
 https://aclanthology.org/2023.eacl-main.184.mp4