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The book 's narrative is divided evenly between two boys named Will Grayson , with Green having written all of the chapters for one , and Levithan having written the chapters for the other which is presented in an alternating chapter fashion .
 person: Green; person: Levithan
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: Green, Levithan 
Answer:
 person: Green; person: Levithan