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We present a new technique for question answering called Predictive Annotation. Predictive Annotation identifies potential answers to questions in text, annotates them accordingly and indexes them. This technique, along with a complementary analysis of questions, passage-level ranking and answer selection, produces a system effective at answering natural-language fact-seeking questions posed against large document collections. Experimental results show the effects of different parameterdoi:10.1145/345508.345574 dblp:conf/sigir/PragerBCR00 fatcat:ar4gxpsigfel7hjhhdm25op2de