A dog runs along a beach near the waves.
The pup is running along the sand near the water.
There is nothing specifying the dog is a pup.    Just because there is sand does not mean it is a beach.
exists e1 x1 x2 x3.(n_wave(x3) & along(e1,x2) & near(x2,x3) & n_beach(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 x1 x2 x3.(n_water(x3) & n_sand(x2) & n_pup(x1) & along(e1,x2) & near(x2,x3) & Actor(e1,x1) & v_run(e1))