Two ladies looking for artifacts.
Two men looking for artifacts.
Ladies aren't men.
exists e1 x1 x2.(for(e1,x2) & n_artifact(x2) & Actor(e1,x1) & v_look(e1) & n_lady(x1) & card_eq_2(x1))
exists e1 x1 x2.(for(e1,x2) & n_artifact(x2) & Actor(e1,x1) & v_look(e1) & n_man(x1) & card_eq_2(x1))