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Two major film industry strikes during the 1930s increased tensions between the Hollywood producers and the unions , particularly the Screen Writers Guild .
 organization: Screen Writers Guild
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Screen Writers Guild 
Answer:
 organization: Screen Writers Guild