With no explanation, label each line with "O", "building-airport", "location-other", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
RHKAAF
was
based
at
Kai
Tak
Airport
from
1979
to
1993
,
with
a
sub-station
at
Sek
Kong
Airfield
.
The:O
RHKAAF:organization-other
was:O
based:O
at:O
Kai:building-airport
Tak:building-airport
Airport:building-airport
from:O
1979:O
to:O
1993:O
,:O
with:O
a:O
sub-station:O
at:O
Sek:location-other
Kong:location-other
Airfield:location-other
.:O