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 ":".
CDO
is
tightly
regulated
in
the
cell
to
maintain
cysteine
homeostasis
.
CDO:other-biologything
is:O
tightly:O
regulated:O
in:O
the:O
cell:O
to:O
maintain:O
cysteine:other-biologything
homeostasis:O
.:O