A little girl is pushing a little boy who is sitting on a swing.
The children are laying there silently
If the girl is pushing the boy then they are not laying silently.
exists e1 e2 s1 s2 x1 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_push(e2) & on(e1,x4) & n_swing(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_boy(x2) & a_little(s2) & Theme(s2,x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
exists e1 s1 s2 x1.(n_child(x1) & a_silently(s2) & Manner(e1,s2) & a_there(s1) & Manner(e1,s1) & Actor(e1,x1) & v_lay(e1))