a dirt biker clears a jump.
the person on the dirt bike cleared the jump
A dirt biker is a person on the dirt bike.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_clear(e1) & n_jump(x3) & n_biker(x1) & of(x1,x2) & n_dirt(x2))
exists e1 x1 x2 x3 x4.(n_jump(x4) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_person(x1) & Theme(e1,x4) & Actor(e1,x1) & v_clear(e1) & on(x1,x2))