Two young boys sitting backwards on wooden chairs outside.
Two brothers sit on chairs.
Two young boys are not necessarily brothers.
exists e1 s1 s2 s3 x1 x2 x3 x4.(a_topic(x1) & on(x1,x3) & Theme(s3,x4) & a_outside(s3) & (x3 = x4) & n_chair(x3) & a_wooden(s2) & Theme(s2,x3) & n_backward(x1) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_boy(x2) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_chair(x2) & Actor(e1,x1) & v_sit(e1) & n_brother(x1) & card_eq_2(x1))