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 ":".
Later
operators
at
the
airport
included
Helikopter
Service
from
1948
and
Nor-Wing
,
and
its
successor
Norving
,
from
1965
.
Later:O
operators:O
at:O
the:O
airport:O
included:O
Helikopter:organization-company
Service:organization-company
from:O
1948:O
and:O
Nor-Wing:organization-company
,:O
and:O
its:O
successor:O
Norving:organization-company
,:O
from:O
1965:O
.:O