With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
While
3-methylfentanyl
was
initially
sold
on
the
black
market
for
only
a
short
time
between
1984
and
1985
,
its
high
potency
made
it
an
attractive
target
to
clandestine
drug
producers
,
as
racemic
3-MF
is
10–15
times
more
potent
than
fentanyl
,
and
so
correspondingly
larger
amounts
of
cut
product
for
street
sales
can
be
produced
for
an
equivalent
amount
of
effort
as
for
producing
fentanyl
itself
;
one
gram
of
3-methylfentanyl
might
be
sufficient
to
produce
several
thousand
dosage
units
once
diluted
for
sale
.
While:O
3-methylfentanyl:other-chemicalthing
was:O
initially:O
sold:O
on:O
the:O
black:O
market:O
for:O
only:O
a:O
short:O
time:O
between:O
1984:O
and:O
1985:O
,:O
its:O
high:O
potency:O
made:O
it:O
an:O
attractive:O
target:O
to:O
clandestine:O
drug:O
producers:O
,:O
as:O
racemic:other-chemicalthing
3-MF:other-chemicalthing
is:O
10–15:O
times:O
more:O
potent:O
than:O
fentanyl:other-chemicalthing
,:O
and:O
so:O
correspondingly:O
larger:O
amounts:O
of:O
cut:O
product:O
for:O
street:O
sales:O
can:O
be:O
produced:O
for:O
an:O
equivalent:O
amount:O
of:O
effort:O
as:O
for:O
producing:O
fentanyl:O
itself:O
;:O
one:O
gram:O
of:O
3-methylfentanyl:other-chemicalthing
might:O
be:O
sufficient:O
to:O
produce:O
several:O
thousand:O
dosage:O
units:O
once:O
diluted:O
for:O
sale:O
.:O