With no explanation, label each line with "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
To
convert
an
existing
AR-10
from
.308
Winchester
to
45
Raptor
,
a
new
barrel
with
extension
needs
to
be
installed
.
To:O
convert:O
an:O
existing:O
AR-10:product-weapon
from:O
.308:product-weapon
Winchester:product-weapon
to:O
45:product-weapon
Raptor:product-weapon
,:O
a:O
new:O
barrel:O
with:O
extension:O
needs:O
to:O
be:O
installed:O
.:O