Two people are playing ice hockey.
there are some players
if people are playing ice hockey, they are called players.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hockey(x2) & of(x2,x3) & n_ice(x3) & n_people(x1) & card_eq_2(x1))
exists p1 x1 x2.((x1 = x2) & n_player(x2))