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Bob Kane and Bill Finger discussed Batman 's background and decided that " there 's nothing more traumatic than having your parents murdered before your eyes " .
 person: Bob Kane; person: Bill Finger
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: Bob Kane; person: Bill Finger