A small white dog runs.
A dog is running to catch a stick.
Dogs run for many reasons, not just to catch a stick.
exists s1 s2 x1 x2.(a_topic(x1) & n_run(x1) & of(x1,x2) & n_dog(x2) & a_white(s2) & Theme(s2,x1) & a_small(s1) & Theme(s1,x1))
exists e1 p1 x1 x2.(Topic(e1,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_catch(e2) & n_stick(x3)) & Actor(e1,x2) & v_run(e1) & n_dog(x2) & n_dog(x1))