Three construction workers working on the interior of a building.
Four workers are working on the outside of a house
Three people can't be four people.
exists e1 x1 x2 x3 x4.(n_interior(x3) & on(e1,x3) & of(x3,x4) & n_building(x4) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2) & card_eq_3(x1))
exists e1 x1 x2 x3.(n_outside(x2) & on(e1,x2) & of(x2,x3) & n_house(x3) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & card_eq_4(x1))