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 ":".
Passengers
flying
for
international
flights
also
started
checking
in
as
this
facility
from
22
February
2012
.
Passengers:O
flying:O
for:O
international:O
flights:O
also:O
started:O
checking:O
in:O
as:O
this:O
facility:O
from:O
22:O
February:O
2012:O
.:O