Question Answering by Reasoning Across Documents with Graph Convolutional Networks

Nicola De Cao, Wilker Aziz, Ivan Titov
2019 Proceedings of the 2019 Conference of the North  
Most research in reading comprehension has focused on answering questions based on individual documents or even single paragraphs. We introduce a neural model which integrates and reasons relying on information spread within documents and across multiple documents. We frame it as an inference problem on a graph. Mentions of entities are nodes of this graph while edges encode relations between different mentions (e.g., within-and crossdocument coreference). Graph convolutional networks (GCNs)
more » ... applied to these graphs and trained to perform multi-step reasoning. Our Entity-GCN method is scalable and compact, and it achieves state-of-the-art results on a multi-document question answering dataset, WIKIHOP (Welbl et al., 2018).
doi:10.18653/v1/n19-1240 dblp:conf/naacl/CaoAT19 fatcat:7jdqxkfhgnetdcc5mjtlmji4xy