Two children run and play in the grass.
The children are playing.
To run and play in the grass is a form of playing.
exists e2 e1 x1 x2 x3.(n_grass(x3) & in(e2,x3) & Actor(e2,x2) & v_play(e2) & n_child(x2) & card_eq_2(x2) & Actor(e1,x1) & v_run(e1) & n_child(x1) & card_eq_2(x1))
exists e1 x1.(n_child(x1) & Actor(e1,x1) & v_play(e1))