A young boy plays on a swing.
A young boy plays on a swing while his parents push him
The boy could be swinging without his parents there to push him
exists e1 s1 x1 x2.(on(e1,x2) & n_swing(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 p1 s1 x1 x2 x3.(exists e2 x1.(Theme(e2,x1) & Actor(e2,x3) & v_push(e2) & n_male(x1)) & n_parent(x3) & of(x3,x1) & n_male(x1) & while(e1,p1) & on(e1,x2) & n_swing(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))