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 ":".
In
appearance
the
locomotive
was
similar
to
a
late
version
GP9
or
GP18
(
i.e.
,
often
with
a
low
short
hood
,
but
with
the
two
exhaust
stacks
over
the
engine
replaced
by
a
single
stack
forward
over
the
exit
of
the
turbocharger
,
in
common
with
later
turbocharged
E
MD
locomotives
.
In:O
appearance:O
the:O
locomotive:O
was:O
similar:O
to:O
a:O
late:O
version:O
GP9:product-train
or:O
GP18:product-train
(:O
i.e.:O
,:O
often:O
with:O
a:O
low:O
short:O
hood:O
,:O
but:O
with:O
the:O
two:O
exhaust:O
stacks:O
over:O
the:O
engine:O
replaced:O
by:O
a:O
single:O
stack:O
forward:O
over:O
the:O
exit:O
of:O
the:O
turbocharger:O
,:O
in:O
common:O
with:O
later:O
turbocharged:O
E:O
MD:product-train
locomotives:product-train
.:O