A medium sized dog on a beach
There is a dog on the beach.
"Dog on the beach" is a rephrasing of "medium sized dog on a beach".
exists s1 s2 x1 x2.(a_topic(x1) & on(x1,x2) & n_beach(x2) & n_dog(x1) & a_sized(s2) & Theme(s2,x1) & a_medium(s1) & Theme(s1,x1))
exists p1 x1 x3.(n_beach(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_dog(x2)))