The man wearing a brown shirt clings to a rock.
Nobody is wearing a shirt
If the man is wearing a brown shirt it cannot be that nobody is wearing a shirt.
exists e1 s1 x1 x2 x3 x4 x5.(n_man(x1) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & to(x3,x5) & n_rock(x5) & n_cling(x3) & of(x3,x4) & n_shirt(x4) & a_brown(s1) & Theme(s1,x3) & (x1 = x2))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_shirt(x2) & n_person(x1))