Dog digs in sand
There are three dogs
Three dogs doesn't needed to be digs in sand
exists e1 x1 x2.(ne_nam_dog(x1) & in(e1,x2) & n_sand(x2) & Actor(e1,x1) & v_dig(e1))
exists p1 x1 x2.((x1 = x2) & n_dog(x2) & card_eq_3(x2))