A young girl puts on a homemade mask.
The young girl is going to a masquerade ball.
Young girls do not necessarily go to masquerade balls when they put on a homemade mask.  In fact, they may not go anywhere at all.
exists e1 s1 x1 x2 x3 x4.(on(e1,x3) & n_mask(x3) & of(x3,x4) & n_homemade(x4) & Theme(e1,x2) & Actor(e1,x1) & v_put(e1) & n_thing(x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(n_girl(x1) & a_young(s1) & Theme(s1,x1) & to(e1,x2) & n_ball(x2) & of(x2,x3) & n_masquerade(x3) & Actor(e1,x1) & v_go(e1))