People brace themselves on a carnival ride.
A police car is chasing a car thief.
A police car can't be waiting for a carnival ride.
exists e1 s1 x1 x2 x3.(n_group(x2) & on(e1,x3) & n_ride(x3) & a_carnival(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_brace(e1) & n_people(x1))
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_chase(e1) & n_thief(x3) & of(x3,x4) & n_car(x4) & n_car(x1) & of(x1,x2) & n_police(x2))