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The league , based in San Francisco , attempted to financially harm laundries run by Japanese American s using four different tactics : picketing laundries , following customers back to their homes and intimidating them , preventing the laundries from purchasing equipment , and threatening public officials who refused to punish the laundries .
 None
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:  
Answer:
 None