With no explanation, label each line with "location-GPE", "O", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
These
trains
were
usually
worked
by
traincrews
from
Croes
Newydd
shed
using
GWR
2800
Class
locomotives
based
there
;
given
the
steep
climb
from
Wrexham
to
Brymbo
,
which
reached
gradients
of
1
in
36
,
a
bank
engine
(
such
as
a
GWR
5600
Class
locomotive
)
was
often
used
.
These:O
trains:O
were:O
usually:O
worked:O
by:O
traincrews:O
from:O
Croes:location-GPE
Newydd:location-GPE
shed:O
using:O
GWR:product-train
2800:product-train
Class:product-train
locomotives:O
based:O
there:O
;:O
given:O
the:O
steep:O
climb:O
from:O
Wrexham:location-GPE
to:O
Brymbo:location-GPE
,:O
which:O
reached:O
gradients:O
of:O
1:O
in:O
36:O
,:O
a:O
bank:O
engine:O
(:O
such:O
as:O
a:O
GWR:product-train
5600:product-train
Class:product-train
locomotive:O
):O
was:O
often:O
used:O
.:O