A dog in a snowy area.
A dog in the desert
A desert isn't snowy.
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_area(x2) & a_snowy(s1) & Theme(s1,x2) & n_dog(x1))
exists x1 x2.(n_desert(x2) & a_topic(x1) & in(x1,x2) & n_dog(x1))