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is a children 's picture book , published in 1991 , written and illustrated by Bill Martin , Jr. and Eric Carle .
 person: Bill Martin , Jr.; person: Eric Carle
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Bill Martin , Jr., Eric Carle 
Answer:
 person: Bill Martin , Jr.; person: Eric Carle