A person on a motorcyle does a stunt in the air.
Nobody doing a stunt
If nobody is doing a stunt then the person on a motorcycle would not be able to do the stunt in the air.
exists e1 x1 x2 x3 x4.(n_air(x4) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_stunt(x3) & on(x1,x2) & n_motorcyle(x2) & n_person(x1))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_stunt(x2) & n_person(x1))