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Brooks , briefing reporters at the U . S . Central Command headquarters , also disclosed that Marines had broken up violent clashes on Wednesday in Tikrit , Saddam ' s hometown .
 Tikrit: 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: attack 
  Option: victim, attacker, place, target, instrument 
Text: {0} 
Answer:
 Tikrit: place