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 ":".
However
,
long-term
treatment
for
chronic
pain
is
highly
controversial
as
there
is
a
high
risk
of
addiction
associated
with
its
use
leading
to
abuse
and
diversion
to
others
even
when
taken
properly
.
However:O
,:O
long-term:O
treatment:O
for:O
chronic:O
pain:O
is:O
highly:O
controversial:O
as:O
there:O
is:O
a:O
high:O
risk:O
of:O
addiction:O
associated:O
with:O
its:O
use:O
leading:O
to:O
abuse:O
and:O
diversion:O
to:O
others:O
even:O
when:O
taken:O
properly:O
.:O