With no explanation, label each line with "O", "other-chemicalthing", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
the
absence
of
p53
or
p21
,
it
was
demonstrated
that
radiated
cells
progressed
into
mitosis
.
In:O
the:O
absence:O
of:O
p53:other-biologything
or:O
p21:other-chemicalthing
,:O
it:O
was:O
demonstrated:O
that:O
radiated:O
cells:O
progressed:O
into:O
mitosis:O
.:O