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 ":".
Underground
urban
rapid
transit
systems
in
former
USSR
and
Finland
,
like
the
Moscow
Metro
,
Saint
Petersburg
Metro
,
Kyiv
Metro
and
the
Helsinki
Metro
use
Russian
gauge
(
)
or
gauge
.
Underground:O
urban:O
rapid:O
transit:O
systems:O
in:O
former:O
USSR:location-GPE
and:O
Finland:location-GPE
,:O
like:O
the:O
Moscow:location-road/railway/highway/transit
Metro:location-road/railway/highway/transit
,:O
Saint:location-road/railway/highway/transit
Petersburg:location-road/railway/highway/transit
Metro:location-road/railway/highway/transit
,:O
Kyiv:location-road/railway/highway/transit
Metro:location-road/railway/highway/transit
and:O
the:O
Helsinki:location-road/railway/highway/transit
Metro:location-road/railway/highway/transit
use:O
Russian:location-GPE
gauge:O
(:O
):O
or:O
gauge:O
.:O