With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
authors
referred
to
it
as
a
by-product
analog
and
it
was
proposed
to
bind
to
the
active
site
of
carboxypeptidase
A
via
succinyl
carboxyl
group
and
a
carbonyl
group
.
The:O
authors:O
referred:O
to:O
it:O
as:O
a:O
by-product:O
analog:O
and:O
it:O
was:O
proposed:O
to:O
bind:O
to:O
the:O
active:O
site:O
of:O
carboxypeptidase:other-chemicalthing
A:other-chemicalthing
via:O
succinyl:other-chemicalthing
carboxyl:other-chemicalthing
group:O
and:O
a:O
carbonyl:other-chemicalthing
group:O
.:O