Three children are playing on a field with a ball.
Children playing monkey in the middle.
You can not infer they are in the middle.
exists e1 x1 x2 x3.(with(e1,x3) & n_ball(x3) & on(e1,x2) & n_field(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_3(x1))
exists e1 x1 x2 x3 x4.(n_middle(x4) & a_topic(x1) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_monkey(x3) & (x1 = x2) & n_child(x1))