With no explanation, label each line with "location-GPE", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
partnership
also
involved
cooperation
with
the
American
airline
Northwest
Airlines
.
The:O
partnership:O
also:O
involved:O
cooperation:O
with:O
the:O
American:location-GPE
airline:O
Northwest:organization-company
Airlines:organization-company
.:O