Children are riding in little cars.
Children playing with toys
We cannot infer that the little cars are toys.
exists e1 s1 x1 x2.(in(e1,x2) & n_car(x2) & a_little(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ride(e1) & n_child(x1))
exists e1 x1 x2 x3.(a_topic(x1) & with(e1,x3) & n_toy(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1))