Dog walking on the beach by the ocean.
A dog is running in the water.
First the dog is referred to as walking, then running.
exists x1 x2 x3 x4.(n_ocean(x4) & n_beach(x3) & a_topic(x1) & on(x1,x3) & by(x3,x4) & n_walking(x1) & (x1 = x2) & ne_nam_dog(x2))
exists e1 x1 x2.(n_water(x2) & in(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))