08/12/2020

Handling Anomalies of Synthetic Questions in Unsupervised Question Answering

Giwon Hong, Junmo Kang, Doyeon Lim, Sung-Hyon Myaeng

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Abstract: Advances in Question Answering (QA) research require additional datasets for new domains, languages, and types of questions, as well as for performance increases. Human creation of a QA dataset like SQuAD, however, is expensive. As an alternative, an unsupervised QA approach has been proposed so that QA training data can be generated automatically. However, the performance of unsupervised QA is much lower than that of supervised QA models. We identify two anomalies in the automatically generated questions and propose how they can be mitigated. We show our approach helps improve unsupervised QA significantly across a number of QA tasks.

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