Discovering Knowledge Graph Schema from Short Natural Language Text via Dialog

Subhasis Ghosh, Arpita Kundu, Aniket Pramanick, Indrajit Bhattacharya


Abstract
We study the problem of schema discovery for knowledge graphs. We propose a solution where an agent engages in multi-turn dialog with an expert for this purpose. Each mini-dialog focuses on a short natural language statement, and looks to elicit the expert’s desired schema-based interpretation of that statement, taking into account possible augmentations to the schema. The overall schema evolves by performing dialog over a collection of such statements. We take into account the probability that the expert does not respond to a query, and model this probability as a function of the complexity of the query. For such mini-dialogs with response uncertainty, we propose a dialog strategy that looks to elicit the schema over as short a dialog as possible. By combining the notion of uncertainty sampling from active learning with generalized binary search, the strategy asks the query with the highest expected reduction of entropy. We show that this significantly reduces dialog complexity while engaging the expert in meaningful dialog.
Anthology ID:
2020.sigdial-1.18
Volume:
Proceedings of the 21th Annual Meeting of the Special Interest Group on Discourse and Dialogue
Month:
July
Year:
2020
Address:
1st virtual meeting
Editors:
Olivier Pietquin, Smaranda Muresan, Vivian Chen, Casey Kennington, David Vandyke, Nina Dethlefs, Koji Inoue, Erik Ekstedt, Stefan Ultes
Venue:
SIGDIAL
SIG:
SIGDIAL
Publisher:
Association for Computational Linguistics
Note:
Pages:
136–146
Language:
URL:
https://aclanthology.org/2020.sigdial-1.18
DOI:
10.18653/v1/2020.sigdial-1.18
Bibkey:
Cite (ACL):
Subhasis Ghosh, Arpita Kundu, Aniket Pramanick, and Indrajit Bhattacharya. 2020. Discovering Knowledge Graph Schema from Short Natural Language Text via Dialog. In Proceedings of the 21th Annual Meeting of the Special Interest Group on Discourse and Dialogue, pages 136–146, 1st virtual meeting. Association for Computational Linguistics.
Cite (Informal):
Discovering Knowledge Graph Schema from Short Natural Language Text via Dialog (Ghosh et al., SIGDIAL 2020)
Copy Citation:
PDF:
https://aclanthology.org/2020.sigdial-1.18.pdf
Video:
 https://youtube.com/watch?v=OD_c-tim8JI