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Realizing the potential of promoting actors and actresses independent of the studio system , Rogers & Cowan pioneered entertainment PR and soon became the largest Entertainment PR firm in the world representing some of the industry ’s most well-known movie stars .
 person: Cowan
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: Cowan