A boy sleeps on a car ride.
The boy is in the car with a parent.
You can not infer he is with a parent.
exists e1 x1 x2 x3.(on(e1,x2) & n_ride(x2) & of(x2,x3) & n_car(x3) & Actor(e1,x1) & v_sleep(e1) & n_boy(x1))
exists p1 x1 x2.(n_car(x2) & n_boy(x1) & in(p1,x2) & exists x3.(with(x1,x3) & n_parent(x3)))