With no explanation, label each line with "building-other", "O", "organization-company", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
When
Amtrak
took
over
the
``
Silverliner
Service
``
from
Penn
Central
in
1972
,
it
was
operated
as
a
quasi-commuter
service
that
terminated
at
Suburban
Station
.
When:O
Amtrak:organization-company
took:O
over:O
the:O
``:O
Silverliner:product-train
Service:product-train
``:O
from:O
Penn:organization-company
Central:organization-company
in:O
1972:O
,:O
it:O
was:O
operated:O
as:O
a:O
quasi-commuter:O
service:O
that:O
terminated:O
at:O
Suburban:building-other
Station:building-other
.:O