Predicate: rakab-u
Roleset id: 01 , to hit someone with the knee
        Arg0: hitter
        Arg1: entity hit
        Arg2: location
Frame:
ركب الولد صاحبه
        Arg0 : الولد
        Gloss: the boy
        Arg1 : صاحبه
        Gloss: his friend