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Lex , originally written by Mike Lesk and Eric Schmidt and described in 1975 , is the standard lexical analyzer generator on many Unix systems , and an equivalent tool is specified as part of the POSIX standard .
 person: Mike Lesk; person: Eric Schmidt
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Mike Lesk; person: Eric Schmidt