With no explanation, label each line with "O", "building-airport", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-hospital" or "building-hotel" preceded by ":".
In
addition
,
several
power
lines
were
down
at
the
Bullhead
City
Airport
.
In:O
addition:O
,:O
several:O
power:O
lines:O
were:O
down:O
at:O
the:O
Bullhead:building-airport
City:building-airport
Airport:building-airport
.:O