With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Necrosis
refers
to
the
fact
that
cells
do
not
die
in
a
programmed
and
orderly
way
as
in
apoptosis
.
Necrosis:O
refers:O
to:O
the:O
fact:O
that:O
cells:O
do:O
not:O
die:O
in:O
a:O
programmed:O
and:O
orderly:O
way:O
as:O
in:O
apoptosis:O
.:O