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Lejaren Hiller and Leonard Issacson composed " Illiac Suite " for string quartet , the first complete work of computer-assisted composition using algorithmic composition .
 person: Lejaren Hiller; person: Leonard Issacson
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: Lejaren Hiller, Leonard Issacson 
Answer:
 person: Lejaren Hiller; person: Leonard Issacson