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 ":".
4-Fluoropethidine
is
a
drug
that
is
a
derivative
of
pethidine
(
meperidine
)
,
which
combines
pethidine
's
opioid
analgesic
effects
with
increased
monoamine
reuptake
inhibition
.
4-Fluoropethidine:other-chemicalthing
is:O
a:O
drug:O
that:O
is:O
a:O
derivative:O
of:O
pethidine:other-chemicalthing
(:O
meperidine:other-chemicalthing
):O
,:O
which:O
combines:O
pethidine:other-chemicalthing
's:O
opioid:O
analgesic:O
effects:O
with:O
increased:O
monoamine:O
reuptake:O
inhibition:O
.:O