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 ":".
As
at
December
2019
,
Mark
3
DVTs
are
in
service
with
Chiltern
Railways
,
Network
Rail
and
Transport
for
Wales
,
with
Mark
4
DVTs
in
service
with
London
North
Eastern
Railway
with
some
to
be
operated
by
Transport
for
Wales
from
2020
.
As:O
at:O
December:O
2019:O
,:O
Mark:product-train
3:product-train
DVTs:product-train
are:O
in:O
service:O
with:O
Chiltern:organization-company
Railways:organization-company
,:O
Network:organization-company
Rail:organization-company
and:organization-company
Transport:organization-company
for:organization-company
Wales:organization-company
,:O
with:O
Mark:product-train
4:product-train
DVTs:product-train
in:O
service:O
with:O
London:organization-company
North:organization-company
Eastern:organization-company
Railway:organization-company
with:O
some:O
to:O
be:O
operated:O
by:O
Transport:organization-company
for:organization-company
Wales:organization-company
from:O
2020:O
.:O