2294
witnesses say iraqi troops are dug in trying to fend off coalition troops making their way into the capital ' s main airport .
 troops: attacker; capital: place; troops: target
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:
 troops: attacker; capital: place; troops: target