Paper: A Noisy-Channel Approach To Question Answering

ACL ID P03-1003
Title A Noisy-Channel Approach To Question Answering
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 2003

We introduce a probabilistic noisy- channel model for question answering and we show how it can be exploited in the context of an end-to-end QA system. Our noisy-channel system outperforms a state- of-the-art rule-based QA system that uses similar resources. We also show that the model we propose is flexible enough to accommodate within one mathematical framework many QA-specific resources and techniques, which range from the exploitation of WordNet, structured, and semi-structured databases to reasoning, and paraphrasing.