With no explanation, label each line with "O", "other-medical", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
According
to
the
CDC
,
tighter
prescription
policies
by
doctors
did
not
necessarily
lead
to
this
increased
heroin
use
.
According:O
to:O
the:O
CDC:organization-government/governmentagency
,:O
tighter:O
prescription:O
policies:O
by:O
doctors:O
did:O
not:O
necessarily:O
lead:O
to:O
this:O
increased:O
heroin:other-medical
use:O
.:O