Two men on canoes on a lake.
Two men are fighting.
Two men cannot be on canoes on a lake and fighting at the same time.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & on(x2,x3) & n_lake(x3) & n_canoe(x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_fight(e1) & n_man(x1) & card_eq_2(x1))