Two children playing in the grass.
A child plays by himself in the grass.
Two children means more than one child playing alone.
exists e1 x1 x2 x3.(n_grass(x3) & a_topic(x1) & in(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_grass(x2) & in(e1,x2) & by(e1,x1) & n_male(x1) & Actor(e1,x1) & v_play(e1) & n_child(x1))