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Up to 20 , 000 protesters thronged the plazas and streets of San Francisco , where more than 1 , 600 people were arrested in the past two days in a civil disobedience campaign .
 people: person; San Francisco: place
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: arrest jail 
  Option: person, agent, place 
Text: {0} 
Answer:
 people: person; San Francisco: place