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Police officers took up their positions across the Gaza Strip , enjoying a freedom of movement they have not known since the intifada exploded in September 2000 , the source said .
 None
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: attack 
  Option: victim, attacker, place, target, instrument 
Text: {0} 
Answer:
 None