OpenKI: Integrating Open Information Extraction and Knowledge Bases with Relation Inference

Dongxu Zhang, Subhabrata Mukherjee, Colin Lockard, Luna Dong, Andrew McCallum


Abstract
In this paper, we consider advancing web-scale knowledge extraction and alignment by integrating OpenIE extractions in the form of (subject, predicate, object) triples with Knowledge Bases (KB). Traditional techniques from universal schema and from schema mapping fall in two extremes: either they perform instance-level inference relying on embedding for (subject, object) pairs, thus cannot handle pairs absent in any existing triples; or they perform predicate-level mapping and completely ignore background evidence from individual entities, thus cannot achieve satisfying quality. We propose OpenKI to handle sparsity of OpenIE extractions by performing instance-level inference: for each entity, we encode the rich information in its neighborhood in both KB and OpenIE extractions, and leverage this information in relation inference by exploring different methods of aggregation and attention. In order to handle unseen entities, our model is designed without creating entity-specific parameters. Extensive experiments show that this method not only significantly improves state-of-the-art for conventional OpenIE extractions like ReVerb, but also boosts the performance on OpenIE from semi-structured data, where new entity pairs are abundant and data are fairly sparse.
Anthology ID:
N19-1083
Volume:
Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers)
Month:
June
Year:
2019
Address:
Minneapolis, Minnesota
Editors:
Jill Burstein, Christy Doran, Thamar Solorio
Venue:
NAACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
762–772
Language:
URL:
https://aclanthology.org/N19-1083
DOI:
10.18653/v1/N19-1083
Bibkey:
Cite (ACL):
Dongxu Zhang, Subhabrata Mukherjee, Colin Lockard, Luna Dong, and Andrew McCallum. 2019. OpenKI: Integrating Open Information Extraction and Knowledge Bases with Relation Inference. In Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers), pages 762–772, Minneapolis, Minnesota. Association for Computational Linguistics.
Cite (Informal):
OpenKI: Integrating Open Information Extraction and Knowledge Bases with Relation Inference (Zhang et al., NAACL 2019)
Copy Citation:
PDF:
https://aclanthology.org/N19-1083.pdf
Code
 zhangdongxu/relation-inference-naacl19