Two swimmers in a pool play at a net with a water polo ball.
the birds ate dogs
Swimmers indicate humans while birds are animals.
exists x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & in(x1,x2) & with(x2,x5) & n_ball(x5) & of(x5,x7) & n_polo(x7) & of(x5,x6) & n_water(x6) & at(x2,x4) & n_net(x4) & n_play(x2) & of(x2,x3) & n_pool(x3) & n_swimmer(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_bird(x1) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_dog(x2))