a boy is playing with a camera whilst standing on a dirt track.
A boy has a camera.
A boy playing with a camera means that he has a camera.
exists e1 e2 x1 x2 x3 x4 x5 x6.(with(e1,x2) & on(e2,x5) & n_track(x5) & of(x5,x6) & n_dirt(x6) & Actor(e2,x4) & v_stand(e2) & (x2 = x4) & n_whilst(x2) & of(x2,x3) & n_camera(x3) & Actor(e1,x1) & v_play(e1) & n_boy(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_camera(x2) & n_boy(x1))