With no explanation, label each line with "location-GPE", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Commonwealth
of
Pennsylvania
provides
the
subsidies
for
Amtrak
for
the
``
Keystone
Service
''
and
``
Pennsylvanian
``
passenger
routes
that
operate
on
this
line
.
The:O
Commonwealth:O
of:O
Pennsylvania:location-GPE
provides:O
the:O
subsidies:O
for:O
Amtrak:organization-company
for:O
the:O
``:O
Keystone:O
Service:O
'':O
and:O
``:O
Pennsylvanian:location-GPE
``:O
passenger:O
routes:O
that:O
operate:O
on:O
this:O
line:O
.:O