Two girls sit in the grass while a boy kneels on top of a soccer ball.
2 girls sit on the grass next to a boy.
girls in the grass can be said girls sit on the grass
exists e1 p1 x1 x2.(n_grass(x2) & exists e2 x3 x4 x5 x6.(on(e2,x4) & of(x4,x5) & n_ball(x5) & of(x5,x6) & n_soccer(x6) & n_top(x4) & Actor(e2,x3) & v_kneel(e2) & n_boy(x3)) & while(e1,p1) & in(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_grass(x2) & to(e1,x3) & n_boy(x3) & r_next(e1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1) & n_date(x1) & a_date_day_02(x1) & a_date_day_02(x1))