A brown dog in a field.
A brown dog is at a petshop.
The dog is in a field, fields are not in petshops.
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_field(x2) & n_dog(x1) & a_brown(s1) & Theme(s1,x1))
exists p1 s1 x1.(exists x2.(at(x1,x2) & n_petshop(x2)) & n_dog(x1) & a_brown(s1) & Theme(s1,x1))