With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
After
the
1961
general
election
,
he
failed
to
be
re-elected
.
After:O
the:O
1961:O
general:O
election:O
,:O
he:O
failed:O
to:O
be:O
re-elected:O
.:O