With no explanation, label each line with "location-GPE", "product-airplane", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Frontier
's
service
was
replaced
by
Pioneer
Airlines
Swearingen
Metroliners
nonstop
to
Denver
,
code
sharing
flights
as
Continental
Express
for
Continental
Airlines
.
Frontier:organization-company
's:O
service:O
was:O
replaced:O
by:O
Pioneer:organization-company
Airlines:organization-company
Swearingen:product-airplane
Metroliners:product-airplane
nonstop:O
to:O
Denver:location-GPE
,:O
code:O
sharing:O
flights:O
as:O
Continental:organization-company
Express:organization-company
for:O
Continental:organization-company
Airlines:organization-company
.:O