With no explanation, label each line with "location-GPE", "O", "location-other", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Code-named
``
Station
Hope
``
,
the
city
was
a
major
stop
on
the
Underground
Railroad
for
escaped
African
American
slaves
en
route
to
Canada
.
Code-named:O
``:O
Station:location-other
Hope:location-other
``:O
,:O
the:O
city:O
was:O
a:O
major:O
stop:O
on:O
the:O
Underground:O
Railroad:O
for:O
escaped:O
African:organization-other
American:organization-other
slaves:organization-other
en:O
route:O
to:O
Canada:location-GPE
.:O