QACTIS Enhancements in TREC QA 2006
نویسندگان
چکیده
The QACTIS system has been tested in previous years at the TREC Question Answering Evaluations. This paper describes new enhancements to the system specific to TREC-2006, including basic improvements and threshold-ing experiments, filtered and Internet-supported pseudo-relevance feedback for information retrieval, and emerging statistics-driven question-answering. For contrast, we also compare our TREC-2006 system performance to that of our top systems from TREC-2004 and TREC-2005 applied to this year's data. Lastly, we analyze evaluator-declared unsupportedness of factoids and nugget decisions of " other " questions to understand major negative changes in performance for these categories over last year.
منابع مشابه
QACTIS-based Question Answering at TREC 2005
The QACTIS system is being developed for the eventual purpose of providing a user the capability of multilingual question-answering from multimedia. QACTIS was tested at TREC-2005 as a means of identifying its successes and limitations in answering questions specifically from English newswire text as it moves in the direction of multilingual , multimedia question answering. In this paper, we pr...
متن کاملQuestion Answering with QACTIS at TREC 2004
We provide a description of the QACTIS question-answering system and its application to and performance in the 2004 TREC question-answering evaluation. Since this was also QACTIS’s first year competing at TREC, we provide a complete overview of its purpose, development, structure, and its future directions.
متن کاملThe Ephyra Qa System at Trec
The Ephyra QA system has been developed as a flexible open-domain QA framework. This framework allows us to combine several techniques for question analysis and answer extraction and to incorporate multiple knowledge bases to best fit the requirements of the TREC QA track, in which we participated this year for the first time. The techniques used include pattern learning and matching, answer ty...
متن کاملThe Ephyra QA System at TREC 2006
The Ephyra QA system has been developed as a flexible open-domain QA framework. This framework allows us to combine several techniques for question analysis and answer extraction and to incorporate multiple knowledge bases to best fit the requirements of the TREC QA track, in which we participated this year for the first time. The techniques used include pattern learning and matching, answer ty...
متن کاملTianwang at TREC 2006 QA Track
This paper describes the architecture and implementation of Tianwang QA system2006, which works for the TREC QA Main task this year. The main improvement is: 1. add one well founded knowledge source from Web – Wikipedia, and employ some natural language processing technologies to extract high quality answers; 2. design and implement a new translation algorithm in query generation. The results s...
متن کامل