This report describes the system developed by the University of Edinburgh and the University of Sydney for the TREC-2005 question answering evaluation exercise. The backbone of our question-answering platform is QED, a linguistically-principled QA system. We experimented with external sources of knowledge, such as Google and Wikipedia, to enhance the performance of QED, especially for reranking and off-line processing of the corpus. For factoid and list questions we performed significantly above the median accuracy score of all participating systems at TREC 2005.
['Kisuh Ahn', 'Johan Bos', 'David Kor', 'Malvina Nissim', 'Bonnie Webber', 'James R. Curran']
Question Answering with QED at TREC-2005