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 ":".
Bad
weather
prevented
the
group
from
flying
its
new
aircraft
until
10
February
.
Bad:O
weather:O
prevented:O
the:O
group:O
from:O
flying:O
its:O
new:O
aircraft:O
until:O
10:O
February:O
.:O