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 ":".
It
closed
on
December
31
,
2010
.
It:O
closed:O
on:O
December:O
31:O
,:O
2010:O
.:O