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 ":".
The
Gunners
'
best
season
was
their
last
,
1985
,
when
they
won
the
National
League
championship
.
The:O
Gunners:organization-sportsteam
':O
best:O
season:O
was:O
their:O
last:O
,:O
1985:O
,:O
when:O
they:O
won:O
the:O
National:organization-sportsleague
League:organization-sportsleague
championship:O
.:O