765
Tracer rounds lit the night sky and artillery boomed near the airport a few kilometers ( miles ) from the heart of President Saddam Hussein ' s capital of 5 million people .
 rounds: 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:
 rounds: instrument