With no explanation, label each line with "location-GPE", "O", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
After
landing
,
the
planes
took
off
again
and
joined
other
VNAF
aircraft
in
a
formation
flyover
of
Saigon
.
After:O
landing:O
,:O
the:O
planes:O
took:O
off:O
again:O
and:O
joined:O
other:O
VNAF:organization-government/governmentagency
aircraft:O
in:O
a:O
formation:O
flyover:O
of:O
Saigon:location-GPE
.:O