This book presents revised versions of lectures given at the Summer Convention on Information Extraction, SCIE 2002, held in Frascati, Italy in July 2002. The following lectures by leading authorities in the field of information extraction are included:- acquisition of domain knowledge- terminology mining- finite-state approaches to Web IE- measuring term representatives- agent-based ontological mediation in IE systems - information retrieval and IE in question answering systems- natural language communication with virtual actors.

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