With no explanation, label each line with "O", "organization-sportsleague", "organization-sportsteam", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
1920
,
when
the
Ohio
League
became
the
APFA
(
now
known
as
the
National
Football
League
)
,
the
Blues
did
not
join
but
continued
to
play
against
APFA
teams
,
only
to
later
suspend
operations
.
In:O
1920:O
,:O
when:O
the:O
Ohio:organization-sportsleague
League:organization-sportsleague
became:O
the:O
APFA:organization-sportsleague
(:O
now:O
known:O
as:O
the:O
National:organization-sportsleague
Football:organization-sportsleague
League:organization-sportsleague
):O
,:O
the:O
Blues:organization-sportsteam
did:O
not:O
join:O
but:O
continued:O
to:O
play:O
against:O
APFA:organization-sportsleague
teams:O
,:O
only:O
to:O
later:O
suspend:O
operations:O
.:O