With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
DNA
damage
appears
to
be
the
primary
underlying
cause
of
cancer
.
DNA:O
damage:O
appears:O
to:O
be:O
the:O
primary:O
underlying:O
cause:O
of:O
cancer:O
.:O