A man in costume is ringing a bell.
A man is wearing a Santa costume.
Just because ringing a bell does not mean Santa.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_ring(e1) & n_bell(x3) & in(x1,x2) & n_costume(x2) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_costume(x2) & (x2 = x3) & ne_org_santa(x3) & n_man(x1))