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
obviated
adding
new
DNA
polymerase
after
each
PCR
cycle
,
thus
greatly
simplifying
DNA
mutagenesis
and
assembly
.
This:O
obviated:O
adding:O
new:O
DNA:O
polymerase:O
after:O
each:O
PCR:other-biologything
cycle:O
,:O
thus:O
greatly:O
simplifying:O
DNA:O
mutagenesis:O
and:O
assembly:O
.:O