trigger question

[Napalm]

in the map im making im using this trigger to make a sound play when a unit attacks

Events
    Unit - A unit Is attacked
Conditions
    (Unit-type of (Attacking unit)) Equal to Apache Attack Chopper
Actions
    Sound - Play ak47_1 <gen>

so i was wondering if there was a way to make attack 1 make one sound and attack 2 make another.