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 ":".
However
,
even
before
the
arrival
of
WDM-2
another
type
of
diesel
locomotive
was
imported
from
ALCO
in
1957
.
However:O
,:O
even:O
before:O
the:O
arrival:O
of:O
WDM-2:product-train
another:O
type:O
of:O
diesel:O
locomotive:O
was:O
imported:O
from:O
ALCO:organization-company
in:O
1957:O
.:O