A man with a dog.
the dog is his best friend
dog doesn't imply best friend
exists x1 x2.(a_topic(x1) & with(x1,x2) & n_dog(x2) & n_man(x1))
exists p1 s1 x1 x2.(n_friend(x2) & r_most(s1) & a_good(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & n_dog(x1) & (x1 = x2))