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 ":".
Extreme
cold
temperatures
were
recorded
at
minus
47
and
a
4-day
whiteout
situation
.
Extreme:O
cold:O
temperatures:O
were:O
recorded:O
at:O
minus:O
47:O
and:O
a:O
4-day:O
whiteout:O
situation:O
.:O