Two children are playing ice hockey on frozen ground outside.
They are playing on a frozen pond.
Frozen ground outside is not necessarily a frozen pond.
exists e1 s1 x1 x2 x3 x4 x5.(on(e1,x4) & n_outside(x4) & of(x4,x5) & n_ground(x5) & a_frozen(s1) & Theme(s1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hockey(x2) & of(x2,x3) & n_ice(x3) & n_child(x1) & card_eq_2(x1))
exists e1 s1 x1.(on(e1,x1) & n_pond(x1) & a_frozen(s1) & Theme(s1,x1) & Actor(e1,x1) & v_play(e1) & n_thing(x1))