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 ":".
It
is
a
bunchgrass
which
grows
in
tufts
and
can
reach
7
feet
(
2.1
meters
)
in
height
under
favorable
conditions
.
It:O
is:O
a:O
bunchgrass:O
which:O
grows:O
in:O
tufts:O
and:O
can:O
reach:O
7:O
feet:O
(:O
2.1:O
meters:O
):O
in:O
height:O
under:O
favorable:O
conditions:O
.:O