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 ":".
On
February
1
,
1988
,
Amtrak
converted
all
``
Keystone
Service
``
trains
to
diesel
power
and
terminated
them
on
the
lower
level
of
30th
Street
Station
,
as
diesel-powered
trains
were
not
allowed
in
the
tunnels
to
Suburban
Station
.
On:O
February:O
1:O
,:O
1988:O
,:O
Amtrak:organization-company
converted:O
all:O
``:O
Keystone:product-train
Service:product-train
``:O
trains:O
to:O
diesel:O
power:O
and:O
terminated:O
them:O
on:O
the:O
lower:O
level:O
of:O
30th:building-other
Street:building-other
Station:building-other
,:O
as:O
diesel-powered:O
trains:O
were:O
not:O
allowed:O
in:O
the:O
tunnels:O
to:O
Suburban:building-other
Station:building-other
.:O