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 ":".
The
enzyme
now
called
CPA3
was
originally
named
mast
cell
carboxypeptidase
A
,
and
another
protein
was
initially
called
CPA3
.
The:O
enzyme:O
now:O
called:O
CPA3:other-biologything
was:O
originally:O
named:O
mast:O
cell:O
carboxypeptidase:other-biologything
A:other-biologything
,:O
and:O
another:O
protein:O
was:O
initially:O
called:O
CPA3:other-biologything
.:O