757
A separate poll of 1 , 846 adults by the leading Yomiuri newspaper published Tuesday showed 64 percent felt Japan had " no choice " but to back the United States , with only 12 percent saying Japan had " every reason " to back the war .
 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