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 ":".
The
airline
eventually
added
some
regular
passenger
flights
as
well
.
The:O
airline:O
eventually:O
added:O
some:O
regular:O
passenger:O
flights:O
as:O
well:O
.:O