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 ":".
They
were
a
cab-equipped
variant
of
the
previous
,
cabless
booster
(
B
unit
)
EMD
DD35
(
sometimes
erroneously
called
the
'
DD35B
'
)
.
They:O
were:O
a:O
cab-equipped:O
variant:O
of:O
the:O
previous:O
,:O
cabless:O
booster:O
(:O
B:O
unit:O
):O
EMD:product-train
DD35:product-train
(:O
sometimes:O
erroneously:O
called:O
the:O
':O
DD35B:product-train
':O
):O
.:O