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 ":".
Uncharacterized
protein
is
composed
of
7.5
%
Aspartate
and
14.0
%
Serine
,
which
constitutes
it
as
a
Serine-rich
protein
.
Uncharacterized:O
protein:O
is:O
composed:O
of:O
7.5:O
%:O
Aspartate:other-chemicalthing
and:O
14.0:O
%:O
Serine:other-chemicalthing
,:O
which:O
constitutes:O
it:O
as:O
a:O
Serine-rich:other-chemicalthing
protein:other-chemicalthing
.:O