Exploiting Explicit Paths for Multi-hop Reading Comprehension Souvik Kunduy∗ and Tushar Khotz and Ashish Sabharwalz and Peter Clarkz yDepartment of Computer Science, National University of Singapore zAllen Institute for Artificial Intelligence, Seattle, WA, U.S.A.
[email protected], ftushark,ashishs,
[email protected] Abstract Query:(always breaking my heart, record label, ?) Supporting Passages: We propose a novel, path-based reasoning (p1) “Always Breaking My Heart” is the second sin- approach for the multi-hop reading compre- gle from Belinda Carlisle’s A Woman and a Man al- hension task where a system needs to com- bum , released in 1996 ( see 1996 in music ) . It ... (p2) A Woman and a Man is the sixth studio al- bine facts from multiple passages to answer bum by American singer Belinda Carlisle, released a question. Although inspired by multi-hop in the United Kingdom on September 23, 1996 by reasoning over knowledge graphs, our pro- Chrysalis Records (then part of the EMI Group, ... posed approach operates directly over unstruc- Candidates: chrysalis records, emi group, virgin tured text. It generates potential paths through records, ... passages and scores them without any di- Answer: chrysalis records rect path supervision. The proposed model, Paths: named PathNet, attempts to extract implicit (“Always Breaking My Heart” ... single from ... A relations from text through entity pair repre- Woman and a Man) sentations, and compose them to encode each (A Woman and a Man ... released ... by ... Chrysalis path. To capture additional context, Path- Records) Net also composes the passage representations Figure 1: Example illustrating our proposed path ex- along each path to compute a passage-based traction and reasoning approach.