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 ":".
One
report
said
twenty-five
troops
were
at
the
post
.
One:O
report:O
said:O
twenty-five:O
troops:O
were:O
at:O
the:O
post:O
.:O