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Twelve - twenty - one p . m . CNN ' s Wolf Blitzer reports according to an eyewitness , a bomb has hit central Baghdad only a few hundred meters from the Palestine Hotel .
 Baghdad: place; bomb: instrument
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:
 Baghdad: place; bomb: instrument