With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Leptomycin
B
has
been
shown
to
be
a
potent
and
specific
nuclear
export
inhibitor
in
human
and
the
fission
yeast
``
S.
pombe
``
.
Leptomycin:other-biologything
B:other-biologything
has:O
been:O
shown:O
to:O
be:O
a:O
potent:O
and:O
specific:O
nuclear:O
export:O
inhibitor:O
in:O
human:O
and:O
the:O
fission:O
yeast:O
``:O
S.:other-biologything
pombe:other-biologything
``:O
.:O