Two boys looking at display.
The boys look at the video game display.
Not all displays are video game displays.
exists e1 x1 x2.(at(e1,x2) & n_display(x2) & Actor(e1,x1) & v_look(e1) & n_boy(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(n_display(x2) & of(x2,x4) & n_game(x4) & of(x2,x3) & n_video(x3) & n_boy(x1) & at(e1,x2) & Actor(e1,x1) & v_look(e1))