The gray-haired man is wearing a sweater.
The gray-haired man is naked.
The man cannot be naked and wearing a sweater at the same time.
exists e1 s1 x1 x2.(n_man(x1) & a_gray-haired(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_sweater(x2))
exists s1 s2 x1.(n_man(x1) & a_gray-haired(s1) & Theme(s1,x1) & Theme(s2,x1) & a_naked(s2))