3121
But do you think , um -- that -- and this isn ' t quite a political issue , but do you think that -- there ' s going to be another attack on the ~ US ?
 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