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He intended to continue to use the name , but when he registered with the Screen Actors Guild , which requires unique registration names to avoid credit ambiguities ( and the possibility that royalty checks would be sent to the wrong actors ) , he discovered that Michael Fox , a veteran character actor , was already registered under the name .
 organization: Screen Actors Guild; person: Michael Fox
Please list all entity words in the text that fit the category.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} 
Answer:
 organization: Screen Actors Guild; person: Michael Fox