A group of people are running on the sand.
A group of people are running on the beach.
Sand does not have to be located on the beach.
exists e1 x1 x2 x3.(n_sand(x3) & on(e1,x3) & Actor(e1,x1) & v_run(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_beach(x3) & on(e1,x3) & Actor(e1,x1) & v_run(e1) & of(x1,x2) & n_people(x2) & n_group(x1))