A group of boys play in front of camera.
The boys are playing in a game.
You can not infer there is a game.
exists e1 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_camera(x4) & n_front(x3) & Actor(e1,x1) & v_play(e1) & of(x1,x2) & n_boy(x2) & n_group(x1))
exists e1 x1 x2.(n_boy(x1) & in(e1,x2) & n_game(x2) & Actor(e1,x1) & v_play(e1))