A fluffy dog in grass.
a skinny dog in a grassfield
A skinny dog is not fluffy.
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_grass(x2) & n_dog(x1) & a_fluffy(s1) & Theme(s1,x1))
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_grassfield(x3) & n_dog(x1) & of(x1,x2) & n_skinny(x2))