a baby wears a Santa hat.
An old man wears a Santa hat.
Man and baby are different.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2) & (x2 = x3) & ne_org_santa(x3) & n_baby(x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2) & (x2 = x3) & ne_org_santa(x3) & n_man(x1) & a_old(s1) & Theme(s1,x1))