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His influences as a bassist include Billy Gould , Cliff Burton , Rex Brown , and Paul D'Amour .
 person: Billy Gould; person: Cliff Burton; person: Rex Brown; person: Paul D'Amour
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Billy Gould, Cliff Burton, Rex Brown, Paul D'Amour 
Answer:
 person: Billy Gould; person: Cliff Burton; person: Rex Brown; person: Paul D'Amour