Two men play a game of ping-pong.
Two men in a ping-pong competition.
Just because the men are playing ping-pong doesn't mean they in competition.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & of(x2,x3) & n_ping-pong(x3) & n_game(x2) & n_man(x1) & card_eq_2(x1))
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_competition(x2) & a_ping-pong(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))