A person performs a stunt with a bike.
The stunt person is jumping off of a ramp.
Not every stunt is  jumping off of a ramp.
exists e1 x1 x2 x3.(with(e1,x3) & n_bike(x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_stunt(x2) & n_person(x1))
exists e1 s1 x1 x2 x3.(n_person(x1) & of(x1,x2) & n_stunt(x2) & a_off(s1) & Manner(e1,s1) & of(e1,x3) & n_ramp(x3) & Actor(e1,x1) & v_jump(e1))