2551
Judy , you ' re seeing us through the night scope because basically for the last hour we ' ve been watching as this ridge behind me in Kalak which of course is the front line between Iraq and Kurdish ( ph ) forces , we ' ve been watching as planes , planes we can hear but cannot see , have been bombing the ridge line behind us .
 ( attack: bombing,  line: target, planes: instrument) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: declare bankruptcy, transfer ownership, transfer money, marry, transport, die, phone write, arrest jail, convict, sentence, sue, end organization, start organization, end position, start position, meet, elect, attack, injure, born, fine, release parole, charge indict, extradite, trial hearing, demonstrate, divorce, nominate, appeal, pardon, execute, acquit, merge organization, Arguments type: beneficiary, prosecutor, plaintiff, seller, victim, buyer, agent, destination, artifact, organization, recipient, person, place, origin, target, giver, adjudicator, attacker, vehicle, defendant, entity, instrument. 
Text: {0} 
Answer:
 ( attack: bombing,  line: target, planes: instrument) 