Two dogs play in the surf.
Two dogs play at a busy beach.
Not all surfs are a busy beach.
exists x1 x2 x3.(n_surf(x3) & a_topic(x1) & in(x1,x3) & n_play(x1) & of(x1,x2) & n_dog(x2) & card_eq_2(x1))
exists e1 s1 x1 x2.(at(e1,x2) & n_beach(x2) & a_busy(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & card_eq_2(x1))