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 ":".
Airport
security
was
introduced
on
1
January
2005
.
Airport:O
security:O
was:O
introduced:O
on:O
1:O
January:O
2005:O
.:O