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Producer Bob Ezrin helped to refine the concept and bridge tensions during recording , as the band were struggling with personal and financial issues at the time .
 person: Bob Ezrin
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: Bob Ezrin 
Answer:
 person: Bob Ezrin