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The film series star , Helen Holmes , who began her career at Keystone Studios , did most of her own stunts .
 person: Helen Holmes; organization: Keystone Studios
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: Helen Holmes; organization: Keystone Studios