a boy stands on a black bench.
A boy sleeping in the black bench
A boy who stands cannot be sleeping
exists e1 s1 x1 x2.(on(e1,x2) & n_bench(x2) & a_black(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stand(e1) & n_boy(x1))
exists e1 s1 x1 x2 x3.(n_bench(x3) & a_black(s1) & Theme(s1,x3) & a_topic(x1) & in(e1,x3) & Actor(e1,x2) & v_sleep(e1) & (x1 = x2) & n_boy(x1))