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there were small pockets of resistance in the area , two , three man groups who had ak - 47s and possible rpgs and what not and our job was to just observe forward and make sure no one was waiting to ambush the avs or the tanks and i was on a metal roof and i stepped
 groups: attacker; area: place; avs: target; tanks: target; ak - 47s: instrument; rpgs: instrument; what not: 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:
 groups: attacker; area: place; avs: target; tanks: target; ak - 47s: instrument; rpgs: instrument; what not: instrument