The gummy bears on the cake are green, orange, yellow, and red in color. 
The gummy bears are sugar-free
Not all gummy bears are sugar-free.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_cake(x3) & n_gummy(x1) & on(e1,x2) & subset_of(x7,x2) & in(x7,x8) & n_color(x8) & n_red(x7) & subset_of(x3,x2) & rel(s1,x5) & rel(x5,x6) & n_yellow(x6) & n_orange(x5) & Theme(s1,x4) & a_green(s1) & (x3 = x4) & Actor(e1,x1) & v_bear(e1))
exists s1 s2 x1.(n_bear(x1) & a_gummy(s1) & Theme(s1,x1) & Theme(s2,x1) & a_sugar-free(s2))