With no explanation, label each line with "O", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Therefore
,
only
specifically
approved
vehicles
(
such
as
the
ICE
T
and
some
railway
service
vehicles
)
may
operate
on
this
route
.
Therefore:O
,:O
only:O
specifically:O
approved:O
vehicles:O
(:O
such:O
as:O
the:O
ICE:product-train
T:product-train
and:O
some:O
railway:O
service:O
vehicles:O
):O
may:O
operate:O
on:O
this:O
route:O
.:O