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
Northern
Rail
franchise
started
operations
in
December
2004
.
The:O
Northern:O
Rail:O
franchise:O
started:O
operations:O
in:O
December:O
2004:O
.:O