Dogs near the edge of water.
Two cats play next to the water.
Dogs cannot also be cats
exists x1 x2 x3.(n_edge(x2) & a_topic(x1) & near(x1,x2) & of(x2,x3) & n_water(x3) & n_dog(x1))
exists e1 x1 x2.(n_water(x2) & to(e1,x2) & r_next(e1) & Actor(e1,x1) & v_play(e1) & n_cat(x1) & card_eq_2(x1))