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 ":".
Research
work
during
the
last
30
years
established
such
important
phenomena
as
stable
mRNA
and
translational
control
,
isolation
and
characterization
of
the
mitotic
apparatus
,
and
the
realization
that
the
major
structural
proteins
of
the
mitotic
apparatus
are
microtubules
.
Research:O
work:O
during:O
the:O
last:O
30:O
years:O
established:O
such:O
important:O
phenomena:O
as:O
stable:O
mRNA:other-biologything
and:O
translational:O
control:O
,:O
isolation:O
and:O
characterization:O
of:O
the:O
mitotic:other-biologything
apparatus:other-biologything
,:O
and:O
the:O
realization:O
that:O
the:O
major:O
structural:O
proteins:O
of:O
the:O
mitotic:other-biologything
apparatus:other-biologything
are:O
microtubules:other-biologything
.:O