Two kids running over a sand dune.
The children are playing at the beach.
Running doesn't have to describe playing, and sand dunes are found more places than beaches. They could be trying to escape a sand worm.
exists e1 x1 x2 x3 x4.(a_topic(x1) & over(e1,x3) & n_dune(x3) & of(x3,x4) & n_sand(x4) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_kid(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_beach(x2) & n_child(x1) & at(e1,x2) & Actor(e1,x1) & v_play(e1))