A young boy plays on a swing.
Young boy playing on swing with his father
the boy could be by himself, not with his father
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 s1 x1 x2 x3 x4.(a_topic(x1) & with(e1,x4) & n_father(x4) & of(x4,x1) & n_male(x1) & on(e1,x3) & n_swing(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))