Predicate: ambush
ambush: Frames file for 'ambush' based on survey of sentences in the WSJ
corpus.
Roleset id: ambush.01 , to attack, vncls: , framnet: Attack
ambush.01: No Vncls.
Roles:
        Arg0: ambusher, agent
        Arg1: entity ambushed
Example: transitive
        person: ns,  tense: past,  aspect: ns,  voice: active,  form: full
        Nicaragua 's Defense Ministry said [0] a group of Contra rebels ambushed two trucks carrying troops in northern Nicaragua , [*-1] killing 18 of the soldiers .
        Arg0: a group of Contra rebels
        Rel: ambushed
        Arg1: two trucks carrying troops
        Argm-loc: in northern Nicaragua
        Argm-adv: [*-1] killing 18 of the soldiers