Two gondolas passing in a canal.
Two boats are in a canal.
Gondolas are a kind of boat.
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_canal(x3) & Actor(e1,x2) & v_pass(e1) & (x1 = x2) & n_gondola(x1) & card_eq_2(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_canal(x2)) & n_boat(x1) & card_eq_2(x1))