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He also covers Tex Williams ' classic 1960 song , " Ballad of Thunder Road " , written by Robert Mitchum and recorded by him in 1963 .
 person: Tex Williams; person: Robert Mitchum
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: Tex Williams, Robert Mitchum 
Answer:
 person: Tex Williams; person: Robert Mitchum