694
American troops stormed a presidential palace and other key buildings in Baghdad as U . S . tanks rumbled into the heart of the battered Iraqi capital on Monday amid the thunder of gunfire and explosions .
 troops: attacker; Baghdad: place; palace: target; buildings: 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; Baghdad: place; palace: target; buildings: target