A baby is sleeping on a blanket.
A baby is sleeping in a crib.
We don't know if the baby is in a crib.
exists e1 x1 x2.(on(e1,x2) & n_blanket(x2) & Actor(e1,x1) & v_sleep(e1) & n_baby(x1))
exists e1 x1 x2.(in(e1,x2) & n_crib(x2) & Actor(e1,x1) & v_sleep(e1) & n_baby(x1))