Two children are climbing on the wall of a white building whilst one child plays with a green ball.
they lost a ball and need to climb to get it
Just because children are playing with a ball, doesn't mean they lost a ball.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7.(n_wall(x2) & on(e1,x2) & of(x2,x3) & with(e2,x7) & n_ball(x7) & a_green(s2) & Theme(s2,x7) & Theme(e2,x6) & Actor(e2,x5) & v_play(e2) & (x3 = x6) & n_child(x5) & card_eq_1(x5) & n_whilst(x3) & of(x3,x4) & n_building(x4) & a_white(s1) & Theme(s1,x3) & Actor(e1,x1) & v_climb(e1) & n_child(x1) & card_eq_2(x1))
exists e1 p1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_lose(e1) & Topic(x3,p1) & exists e2 p2.(Topic(e2,p2) & Actor(e2,x3) & v_climb(e2) & exists e3.(Theme(e3,x1) & Actor(e3,x3) & v_get(e3))) & n_thing(x1) & n_thing(x1) & n_need(x3) & n_ball(x1) & subset_of(x3,x2) & subset_of(x1,x2))