Two hockey players are skating on the ice.
two people are playing street hockey
They are on ice, not the street.
exists e1 x1 x2 x3.(n_ice(x3) & on(e1,x3) & Actor(e1,x1) & v_skate(e1) & n_player(x1) & of(x1,x2) & n_hockey(x2) & card_eq_2(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hockey(x2) & of(x2,x3) & n_street(x3) & n_people(x1) & card_eq_2(x1))