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 ":".
168
troops
could
be
accommodated
in
narrow
dormitories
.
168:O
troops:O
could:O
be:O
accommodated:O
in:O
narrow:O
dormitories:O
.:O