A yellow dog in the snow.
The dog is outside.
Yellow describes the dog.  Snow is usually outside.
exists s1 x1 x2.(n_snow(x2) & a_topic(x1) & in(x1,x2) & n_dog(x1) & a_yellow(s1) & Theme(s1,x1))
exists s1 x1.(n_dog(x1) & Theme(s1,x1) & a_outside(s1))