Dan I. Moldovan, Mihai Surdeanu. On the Role of Information Retrieval and Information Extraction in Question Answering Systems. In Maria Teresa Pazienza, editor, Information Extraction in the Web Era: Natural Language Communication for Knowledge Acquisition and Intelligent Information Agents, papers from SCIE 2002, Frascati (Rome, Italy), July 2002. Volume 2700 of Lecture Notes in Computer Science, pages 129-147, Springer, 2002. [doi]
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