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 ":".
Most
electric
trains
on
the
present-day
West
London
Line
stop
near
the
site
of
the
former
station
to
change
current
collection
method
,
as
the
line
to
the
north
is
electrified
by
AC
overhead
lines
and
to
the
south
by
DC
third
rail
.
Most:O
electric:O
trains:O
on:O
the:O
present-day:O
West:location-road/railway/highway/transit
London:location-road/railway/highway/transit
Line:location-road/railway/highway/transit
stop:O
near:O
the:O
site:O
of:O
the:O
former:O
station:O
to:O
change:O
current:O
collection:O
method:O
,:O
as:O
the:O
line:O
to:O
the:O
north:O
is:O
electrified:O
by:O
AC:O
overhead:O
lines:O
and:O
to:O
the:O
south:O
by:O
DC:location-road/railway/highway/transit
third:location-road/railway/highway/transit
rail:location-road/railway/highway/transit
.:O