With no explanation, label each line with "location-GPE", "O", "organization-politicalparty", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
A
``
Städteexpress
``
(
``
city
express
''
)
ran
to
Berlin
during
the
Communist
period
.
A:O
``:O
Städteexpress:product-train
``:O
(:O
``:O
city:O
express:O
'':O
):O
ran:O
to:O
Berlin:location-GPE
during:O
the:O
Communist:organization-politicalparty
period:O
.:O