With no explanation, label each line with "location-GPE", "O", "product-airplane", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Operations
started
in
early
1967
,
linking
Bangui
with
Berberati
using
Douglas
DC-3
aircraft
.
Operations:O
started:O
in:O
early:O
1967:O
,:O
linking:O
Bangui:location-GPE
with:O
Berberati:location-GPE
using:O
Douglas:product-airplane
DC-3:product-airplane
aircraft:O
.:O