With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
originally
ran
via
Crewe
but
from
September
2012
was
rerouted
via
Wrexham
General
after
a
Driving
Van
Trailer
was
added
,
allowing
the
train
to
change
direction
at
Chester
.
It:O
originally:O
ran:O
via:O
Crewe:location-GPE
but:O
from:O
September:O
2012:O
was:O
rerouted:O
via:O
Wrexham:person-other
General:O
after:O
a:O
Driving:O
Van:O
Trailer:O
was:O
added:O
,:O
allowing:O
the:O
train:O
to:O
change:O
direction:O
at:O
Chester:location-GPE
.:O