A man with a helmet rides his bike on a bumpy path.
The man is racing cars.
The man cannot be race cars and also be on a bike.
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_path(x4) & a_bumpy(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bike(x3) & of(x3,x1) & n_male(x1) & with(x1,x2) & n_helmet(x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_race(e1) & n_car(x2))