A very happy looking young woman preparing a snack.
Snack preparing her
The snack can only be prepared by the woman.  Snacks themselves are inert objects, and so cannot be preparing anything.
exists e1 e2 s1 s2 x1 x2 x3.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_prepare(e2) & n_snack(x3) & (x1 = x2) & n_woman(x1) & a_young(s2) & Theme(s2,x1) & Actor(e1,x1) & v_look(e1) & a_happy(s1) & Theme(s1,x1) & r_very(x1))
exists e1 x1 x2.(a_topic(x1) & Theme(e1,x1) & Actor(e1,x2) & v_prepare(e1) & n_female(x1) & (x1 = x2) & n_snack(x1))