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Palestinian security forces returned Monday to the positions they held in the Gaza Strip before the outbreak of the 33 - month Palestinian uprising as Israel removed all major checkpoints in the coastal territory , a Palestinian security source said .
 Palestinian: attacker
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:
 Palestinian: attacker