A dog above snow.
The dog is a golden retriever
Just because there is a dog doesn't mean it is a golden retriever.
exists x1 x2.(a_topic(x1) & above(x1,x2) & n_snow(x2) & n_dog(x1))
exists p1 x1.(n_dog(x1) & exists s1 x2.((x1 = x2) & n_retriever(x2) & a_golden(s1) & Theme(s1,x2)))