With no explanation, label each line with "location-GPE", "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Maintenance
Command
of
Indian
Air
Force
has
its
current
headquarters
at
Vayusena
Nagar
in
Nagpur
.
Maintenance:O
Command:O
of:O
Indian:organization-other
Air:organization-other
Force:organization-other
has:O
its:O
current:O
headquarters:O
at:O
Vayusena:location-GPE
Nagar:location-GPE
in:O
Nagpur:location-GPE
.:O