A man is fixing another man's jacket.
The man is fixing a stuck zipper.
A man fixing another's jacket does not mean it is a stuck zipper being fixed.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_fix(e1) & n_jacket(x3) & of(x3,x2) & n_man(x2) & -(x2 = x1) & n_man(x1) & n_man(x1))
exists e1 s1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_fix(e1) & n_zipper(x2) & a_stuck(s1) & Theme(s1,x2))