A person walking with a dog.
A person and a dog outdoors.
One can walk with a dog if one is outdoors.
exists x1 x2 x3.(a_topic(x1) & with(x1,x3) & n_dog(x3) & Time(x1,x2) & n_walking(x2) & n_person(x1))
exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & n_outdoors(x2) & of(x2,x3) & n_dog(x3) & subset_of(x1,s1) & n_person(x1))