Slender dog running in the sand on a sunny day.
A dog rolls around in the sand.
Slender dog is a very specific statement compared to a dog which is very vague, also running is very different than rolls.
exists e1 s1 x1 x2 x3 x4 x5.(n_sand(x4) & a_topic(x1) & on(e1,x5) & n_day(x5) & a_sunny(s1) & Theme(s1,x5) & in(e1,x4) & Actor(e1,x3) & v_run(e1) & (x1 = x3) & n_dog(x1) & (x1 = x2) & ne_nam_slender(x2))
exists e1 p1 x1 x2.(n_sand(x2) & in(e1,x2) & exists s1.(Theme(s1,x1) & a_around(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_roll(e1) & n_dog(x1))