A small brown dog playing with bubbles in grass.
The brown dog is playing with a bone.
Bubbles are not the same thing as a bone.
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & in(x1,x4) & n_grass(x4) & with(x1,x3) & n_bubble(x3) & n_playing(x1) & of(x1,x2) & n_dog(x2) & a_brown(s2) & Theme(s2,x1) & a_small(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(n_dog(x1) & a_brown(s1) & Theme(s1,x1) & with(e1,x2) & n_bone(x2) & Actor(e1,x1) & v_play(e1))