Two people are playing ice hockey.
there is competetion going on between players
Two people can play hockey without being in a competetion.
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 e1 s1 x2 x3 x4.((x1 = x2) & on(e1,x4) & n_player(x4) & a_between(s1) & Theme(s1,x4) & Actor(e1,x3) & v_go(e1) & (x2 = x3) & n_competetion(x2))