Two ladies looking overboard.
Two ladies on a boat.
Two ladies do not have to be on a boat to be looking overboard.
exists e1 s1 x1 x2.(n_overboard(x1) & a_.(s1) & Theme(s1,x1) & Actor(e1,x1) & v_look(e1) & of(x1,x2) & n_lady(x2) & card_eq_2(x1) & a_topic(x1))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_boat(x2) & n_lady(x1) & card_eq_2(x1))