Accession Number:
ADA462242
Title:
A Noisy-Channel Approach to Question Answering
Descriptive Note:
Conference paper
Corporate Author:
UNIVERSITY OF SOUTHERN CALIFORNIA MARINA DEL REY INFORMATION SCIENCES INST
Personal Author(s):
Report Date:
2003-01-01
Pagination or Media Count:
9.0
Abstract:
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.
Descriptors:
Subject Categories:
- Information Science
- Linguistics
- Statistics and Probability