With no explanation, label each line with "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
After
three
teams
which
qualified
for
the
1950
World
Cup
withdrew
,
several
teams
which
had
failed
to
qualify
were
invited
to
replace
them
,
but
declined
.
After:O
three:O
teams:O
which:O
qualified:O
for:O
the:O
1950:O
World:event-sportsevent
Cup:event-sportsevent
withdrew:O
,:O
several:O
teams:O
which:O
had:O
failed:O
to:O
qualify:O
were:O
invited:O
to:O
replace:O
them:O
,:O
but:O
declined:O
.:O