With no explanation, label each line with "O", "organization-company", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
``
Silver
Star
``
operates
over
a
combination
of
Amtrak
,
CSX
Transportation
,
and
Norfolk
Southern
Railway
trackage
:
The:O
``:O
Silver:product-train
Star:product-train
``:O
operates:O
over:O
a:O
combination:O
of:O
Amtrak:organization-company
,:O
CSX:organization-company
Transportation:organization-company
,:O
and:O
Norfolk:organization-company
Southern:organization-company
Railway:organization-company
trackage:O
::O