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Part 1 Introduction: issues in text-based lexicon acquistion - theproblem of lexical knowledge acquistion; text-based lexicon acquisition,Branimir Boguraev, James Pustejovsky. Part 2 Coping with unknownlexicalizations: internal and external evidence in the identification andsemantic categorization of proper names - introduction, internal versusexternal evidence, procedure overview - delimit, classify, record, thesetting for the process, walking through an example, David D. McDonald;identifying unknown proper names in newswire text - introduction, approachesto name identification, proper names - syntax and semantics, overallalgorithm, mention generator, knowledge sources, representation ofuncertainty, appositives, coreference, Inderjeet Mani, T. Richard MacMillan;categorizing and standardizing proper nouns for efficient informationretrieval - introduction, proper noun boundary identification, proper nounclassification scheme, use of proper nouns in matching, performanceevaluation, system comparisons, future directions, Woojin Paik, Elizabeth D.Liddy, Edmund Yu, Mary McKenna. Part 3 Task-driven lexicon induction:customizing a lexicon to better suit a computational task - introduction,creating categories from WORDNET, a topic labeler, augmenting categories withrelevant terms, combining distant categories, Marti A. Hearst, HinrichSchutze; towards building contextual representations of word senses usingstatistical models - contextual representations, acquiring topical context,an upper bound for classifier performance, acquiring local context, ClaudiaLeacock, Geoffrey Towell, Ellen M. Voorhees. Part 4 Categorization of lexicalunits: a context driven conceptual clustering method for verb classification- introduction, CIAULA - an algorithm to acquire word clusters, basic levelcategories, Roberto Basili, Maria-Teresa Pazienza, Paola Velardi;distinguished usage - introduction, information extraction, functionality inlexical semantics, integrating syntactic with semantic constraints, patterns,the current state of pattern acquisition, structural similarity clustering,lexical clustering using edit distance, context clustering, context methodresults, Scott A. Waterman. (Part contents).