Two boys are playing in a sprinkler.
They are playing in the grass.
Sprinkler need not always be installed near grass.
exists e1 x1 x2.(in(e1,x2) & n_sprinkler(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_grass(x2) & n_thing(x1) & in(e1,x2) & Actor(e1,x1) & v_play(e1))