With no explanation, label each line with "O", "location-road/railway/highway/transit", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Tokyo
Metro
operates
in
an
underground
station
with
two
side
platforms
serving
the
Tokyo
Metro
Ginza
Line
.
Tokyo:location-road/railway/highway/transit
Metro:location-road/railway/highway/transit
operates:O
in:O
an:O
underground:O
station:O
with:O
two:O
side:O
platforms:O
serving:O
the:O
Tokyo:location-road/railway/highway/transit
Metro:location-road/railway/highway/transit
Ginza:location-road/railway/highway/transit
Line:location-road/railway/highway/transit
.:O