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 ":".
This
adds
to
the
simplicity
of
use
and
removes
a
potential
source
of
error
while
operating
the
handgun
under
stress
.
This:O
adds:O
to:O
the:O
simplicity:O
of:O
use:O
and:O
removes:O
a:O
potential:O
source:O
of:O
error:O
while:O
operating:O
the:O
handgun:O
under:O
stress:O
.:O