A man has dreadlocks.
A man is dirty.
Not all men has dreadlocks are dirty
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_dreadlock(x2) & n_man(x1))
exists s1 x1.(Theme(s1,x1) & a_dirty(s1) & n_man(x1))