With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
weapon
is
usually
equipped
with
a
tripod
and
a
PAG-17
2.7×
telescopic
sight
;
it
can
also
have
back-up
iron
sights
installed
.
The:O
weapon:O
is:O
usually:O
equipped:O
with:O
a:O
tripod:O
and:O
a:O
PAG-17:product-other
2.7×:product-other
telescopic:product-other
sight:product-other
;:O
it:O
can:O
also:O
have:O
back-up:O
iron:O
sights:O
installed:O
.:O