With no explanation, label each line with "location-GPE", "O", "location-road/railway/highway/transit", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
is
located
to
the
south
of
Old
Airport
Road
in
the
Old
Kallang
Airport
Estate
.
It:O
is:O
located:O
to:O
the:O
south:O
of:O
Old:location-road/railway/highway/transit
Airport:location-road/railway/highway/transit
Road:location-road/railway/highway/transit
in:O
the:O
Old:location-GPE
Kallang:location-GPE
Airport:location-GPE
Estate:location-GPE
.:O