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 ":".
The
lightweight
,
aerodynamic
carbody
construction
pioneered
with
the
``
Zephyr
``
has
been
reintroduced
with
Amtrak
's
GE
Genesis
diesel
locomotives
in
their
quest
for
greater
fuel
efficiency
.
The:O
lightweight:O
,:O
aerodynamic:O
carbody:O
construction:O
pioneered:O
with:O
the:O
``:O
Zephyr:product-train
``:O
has:O
been:O
reintroduced:O
with:O
Amtrak:product-train
's:product-train
GE:product-train
Genesis:product-train
diesel:product-train
locomotives:product-train
in:O
their:O
quest:O
for:O
greater:O
fuel:O
efficiency:O
.:O