A girl laughs while holding an younger girl on her back and facing a small child.
The girls sits with two other girls on a bench.
Being on her back implies she is laying down. She cannot be laying down while she sits down.
exists e2 e1 e3 s1 s2 x1 x2 x3 x4.(while(e1,e3) & Theme(e3,x4) & Actor(e3,x1) & v_face(e3) & n_child(x4) & a_small(s2) & Theme(s2,x4) & while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_hold(e2) & on(x2,x3) & n_back(x3) & of(x3,x1) & n_female(x1) & n_girl(x2) & r_more(s1) & a_younger(s1) & Theme(s1,x2) & Actor(e1,x1) & v_laugh(e1) & n_girl(x1))
exists e1 x1 x2 x3.(n_girl(x2) & on(e1,x3) & n_bench(x3) & with(e1,x1) & -(x1 = x2) & n_girl(x1) & n_girl(x1) & card_eq_2(x1) & Actor(e1,x1) & v_sit(e1))