Selecting Sentences versus Selecting Tree Constituents for Automatic Question Ranking

Alberto Barrón-Cedeño, Giovanni Da San Martino, Salvatore Romeo, Alessandro Moschitti


Abstract
Community question answering (cQA) websites are focused on users who query questions onto an online forum, expecting for other users to provide them answers or suggestions. Unlike other social media, the length of the posted queries has no limits and queries tend to be multi-sentence elaborations combining context, actual questions, and irrelevant information. We approach the problem of question ranking: given a user’s new question, to retrieve those previously-posted questions which could be equivalent, or highly relevant. This could prevent the posting of nearly-duplicate questions and provide the user with instantaneous answers. For the first time in cQA, we address the selection of relevant text —both at sentence- and at constituent-level— for parse tree-based representations. Our supervised models for text selection boost the performance of a tree kernel-based machine learning model, allowing it to overtake the current state of the art on a recently released cQA evaluation framework.
Anthology ID:
C16-1237
Volume:
Proceedings of COLING 2016, the 26th International Conference on Computational Linguistics: Technical Papers
Month:
December
Year:
2016
Address:
Osaka, Japan
Venue:
COLING
SIG:
Publisher:
The COLING 2016 Organizing Committee
Note:
Pages:
2515–2525
Language:
URL:
https://aclanthology.org/C16-1237
DOI:
Bibkey:
Cite (ACL):
Alberto Barrón-Cedeño, Giovanni Da San Martino, Salvatore Romeo, and Alessandro Moschitti. 2016. Selecting Sentences versus Selecting Tree Constituents for Automatic Question Ranking. In Proceedings of COLING 2016, the 26th International Conference on Computational Linguistics: Technical Papers, pages 2515–2525, Osaka, Japan. The COLING 2016 Organizing Committee.
Cite (Informal):
Selecting Sentences versus Selecting Tree Constituents for Automatic Question Ranking (Barrón-Cedeño et al., COLING 2016)
Copy Citation:
PDF:
https://aclanthology.org/C16-1237.pdf