With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
airline
involved
was
actually
U.S.
Airways
(
although
the
airline
later
merged
with
American
Airlines
in
2015
)
.
The:O
airline:O
involved:O
was:O
actually:O
U.S.:organization-company
Airways:organization-company
(:O
although:O
the:O
airline:O
later:O
merged:O
with:O
American:organization-company
Airlines:organization-company
in:O
2015:O
):O
.:O