With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
This
led
to
the
development
of
the
VL10
(
3kV
DC
)
and
VL80
(
25
kV
AC
)
locomotives
.
This:O
led:O
to:O
the:O
development:O
of:O
the:O
VL10:product-other
(:O
3kV:product-other
DC:product-other
):O
and:O
VL80:product-other
(:O
25:product-other
kV:product-other
AC:product-other
):O
locomotives:O
.:O