Two men are fishing in a river.
The men are working on a car.
One is either fishing in a river or working on a car, not both.
exists e1 x1 x2.(in(e1,x2) & n_river(x2) & Actor(e1,x1) & v_fish(e1) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_man(x1) & on(e1,x2) & n_car(x2) & Actor(e1,x1) & v_work(e1))