Two girls sit in the grass while a boy kneels on top of a soccer ball.
They are all playing soccer together.
Just because the girls sit in the grass while the boy kneels on top of a soccer ball does not mean that they are playing soccer together.
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 s1 s2 x1 x2.(n_thing(x1) & a_all(s2) & Manner(e1,s2) & a_together(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_soccer(x2))