Exploiting Definition Sentences to Answer Factoid/List Questions
	• Conduct passage retrieval for factoid/list questions on the definition sentences about the topic. – Much more efficient due to smaller search space. – Average accuracy of 0.50, lower than that over all topic-related documents. • Due to low recall – imposed cut-off for selecting definition sentences (naïve use of definitions). • Some sentences for answering factoid/list questions are not definition sentences.