With no explanation, label each line with "O", "other-medical", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
,
along
with
WF-23
the
other
``
2-naphthyl
``
cocaine
analogue
,
are
considered
the
more
potent
of
the
WF
series
cocaine
analogues
.
It:O
,:O
along:O
with:O
WF-23:other-medical
the:O
other:O
``:O
2-naphthyl:other-medical
``:O
cocaine:other-medical
analogue:O
,:O
are:O
considered:O
the:O
more:O
potent:O
of:O
the:O
WF:other-medical
series:O
cocaine:other-medical
analogues:O
.:O