Two small children walk down a sandy beach.
Two children walk on a beach.
Children walk on a beach it implies is sandy
exists e1 s1 x1 x2 x3.(down(e1,x2) & n_beach(x2) & of(x2,x3) & n_sandy(x3) & Actor(e1,x1) & v_walk(e1) & n_child(x1) & a_small(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_beach(x2) & Actor(e1,x1) & v_walk(e1) & n_child(x1) & card_eq_2(x1))