A person is swinging by a cord over the ocean.
A man is sleeping.
One cannot be sleeping and swinging at the same time.
exists e1 x1 x2 x3.(n_ocean(x3) & over(e1,x3) & by(e1,x2) & n_cord(x2) & Actor(e1,x1) & v_swing(e1) & n_person(x1))
exists e1 x1.(Actor(e1,x1) & v_sleep(e1) & n_man(x1))