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Nightmare Freddie gimmick Gilbert was given the Nightmare Freddie gimmick by his father , Tommy Gilbert , who had returned to wrestling after being a referee for a time but opted to stay under a mask during the tenure .
 person: Gilbert; person: Tommy Gilbert
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: Gilbert, Tommy Gilbert 
Answer:
 person: Gilbert; person: Tommy Gilbert