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
valued
as
a
good
roughage
source
for
ruminants
such
as
cattle
.
It:O
is:O
valued:O
as:O
a:O
good:O
roughage:O
source:O
for:O
ruminants:O
such:O
as:O
cattle:O
.:O