With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
railroad
was
intended
to
run
as
a
conveyor
belt
,
with
trains
cycling
between
the
coal
mine
and
the
plant
.
The:O
railroad:O
was:O
intended:O
to:O
run:O
as:O
a:O
conveyor:O
belt:O
,:O
with:O
trains:O
cycling:O
between:O
the:O
coal:O
mine:O
and:O
the:O
plant:O
.:O