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 ":".
Methane
gas
extracted
from
land
fills
is
also
used
in
a
minor
capacity
,
as
are
other
biofuels
.
Methane:O
gas:O
extracted:O
from:O
land:O
fills:O
is:O
also:O
used:O
in:O
a:O
minor:O
capacity:O
,:O
as:O
are:O
other:O
biofuels:O
.:O