With no explanation, label each line with "O", "building-sportsfacility", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
At
the
end
of
the
group
stage
,
the
top
two
teams
advanced
to
the
knockout
stage
,
beginning
with
the
quarter-finals
and
culminating
with
the
gold
medal
match
at
the
Azteca
Stadium
on
26
October
1968
.
At:O
the:O
end:O
of:O
the:O
group:O
stage:O
,:O
the:O
top:O
two:O
teams:O
advanced:O
to:O
the:O
knockout:O
stage:O
,:O
beginning:O
with:O
the:O
quarter-finals:O
and:O
culminating:O
with:O
the:O
gold:O
medal:O
match:O
at:O
the:O
Azteca:building-sportsfacility
Stadium:building-sportsfacility
on:O
26:O
October:O
1968:O
.:O