Hockey players during a game.
The hockey players are practicing before a game.
The sentences contradict each other saying that the hockey players are  doing something before a game, then it says that they are doing something during a hockey game.
exists x1 x2 x3.(a_topic(x1) & during(x1,x3) & n_game(x3) & n_player(x1) & (x1 = x2) & ne_nam_hockey(x2))
exists e1 x1 x2 x3.(n_player(x1) & of(x1,x2) & n_hockey(x2) & before(e1,x3) & n_game(x3) & Actor(e1,x1) & v_practice(e1))