A group of people watching a snowboarder perform a trick.
A person does a trick for an audience.
A snowboarder is a person, and people watching is an audience.
exists e2 e1 x1 x2 x3 x4 x5.(Theme(e2,x5) & Actor(e2,x1) & v_perform(e2) & n_trick(x5) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & n_snowboarder(x4) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(for(e1,x3) & n_audience(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_person(x1))