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From 1976 until the show 's cancellation in 1989 , the Master was portrayed by a succession of actors : Peter Pratt , Geoffrey Beevers and Anthony Ainley .
 person: Peter Pratt; person: Geoffrey Beevers; person: Anthony Ainley
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: Peter Pratt; person: Geoffrey Beevers; person: Anthony Ainley