Recent work in Question Answering has focused on web-based systems that extract answers using simple lexicosyntactic patterns. We present an alternative strategy in which patterns are used to extract highly precise relational information offline, creating a data repository that is used to efficiently answer questions. We evaluate our strategy on a challenging subset of questions, i.e. "Who is …" questions, against a state of the art web-based Question Answering system. Results indicate that the extracted relations answer 25% more questions correctly and do so three orders of magnitude faster than the state of the art system.
Fleischman et al. REF used lexico-syntactic patterns to extract highly precise relational information from text collection offline creating a data repository that is used to retrieve answers to questions directly.
Offline Strategies For Online Question Answering: Answering Questions Before They Are Asked
Annual Meeting Of The Association For Computational Linguistics
Computer Science