A black dog runs on the beach.
The black dog is running on the beach to fetch a stick.
Just because a dog is running does not mean he is going to fetch a stick.
exists e1 s1 x1 x2.(n_beach(x2) & on(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists e1 p1 s1 s2 x1 x2.(n_beach(x2) & n_dog(x1) & a_black(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1) & Topic(e1,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_fetch(e2) & n_stick(x3)) & on(e1,x2) & Actor(e1,x1) & v_run(e1))