The dog is holding a yellow toy.
A dog is holding a yellow bone.
Not all dog toys are a yellow bone.
exists e1 s1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_toy(x2) & a_yellow(s1) & Theme(s1,x2))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_bone(x2) & a_yellow(s1) & Theme(s1,x2) & n_dog(x1))