A woman cutting a brown cake.
The mom is slicing the chocolate cake.
Not all women are moms.  Just because the cake is brown does not mean it is a chocolate cake.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_cut(e1) & n_cake(x3) & a_brown(s1) & Theme(s1,x3) & (x1 = x2) & n_woman(x1))
exists e1 x1 x2 x3.(n_cake(x2) & of(x2,x3) & n_chocolate(x3) & n_mom(x1) & Theme(e1,x2) & Actor(e1,x1) & v_slice(e1))