With no explanation, label each line with "location-GPE", "O", "building-airport", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-hospital" preceded by ":".
The
nearest
airport
serving
the
area
is
Naharlagun
Airport
,
which
is
located
in
Naharlagun
.
The:O
nearest:O
airport:O
serving:O
the:O
area:O
is:O
Naharlagun:building-airport
Airport:building-airport
,:O
which:O
is:O
located:O
in:O
Naharlagun:location-GPE
.:O