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 ":".
The
event
ran
again
on
20
December
2010
.
The:O
event:O
ran:O
again:O
on:O
20:O
December:O
2010:O
.:O