A woman is posing by a building.
A woman is sleeping.
One cannot be sleeping and posing at once.
exists e1 x1 x2.(by(e1,x2) & n_building(x2) & Actor(e1,x1) & v_pose(e1) & n_woman(x1))
exists e1 x1.(Actor(e1,x1) & v_sleep(e1) & n_woman(x1))