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 ":".
This
primer
is
attached
to
the
single-stranded
DNA
template
,
and
DNA
polymerase
elongates
the
chain
by
incorporating
nucleotides
;
DNA
polymerase
also
proofreads
the
newly
synthesized
DNA
strand
.
This:O
primer:O
is:O
attached:O
to:O
the:O
single-stranded:O
DNA:other-biologything
template:O
,:O
and:O
DNA:other-biologything
polymerase:other-biologything
elongates:O
the:O
chain:O
by:O
incorporating:O
nucleotides:O
;:O
DNA:other-biologything
polymerase:other-biologything
also:O
proofreads:O
the:O
newly:O
synthesized:O
DNA:other-biologything
strand:O
.:O