A man, wearing glasses, is rock climbing.
The man is not wearing glasses.
A man cannot be wearing glasses and said not wearing glasses at the same time.
exists e1 p1 x1 x2 x3.(exists x4 x5.((x1 = x4) & n_climb(x4) & of(x4,x5) & n_rock(x5)) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_glass(x3) & (x1 = x2) & n_man(x1))
exists x1.(n_man(x1) & -exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_glass(x2)))