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 ":".
Some
3,000
rebels
were
killed
.
Some:O
3,000:O
rebels:O
were:O
killed:O
.:O