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 ":".
Hi-point
's
handguns
use
a
blowback
design
similar
to
that
used
in
the
Walther
PPK
and
Russian
Makarov
PM
.
Hi-point:product-weapon
's:O
handguns:O
use:O
a:O
blowback:O
design:O
similar:O
to:O
that:O
used:O
in:O
the:O
Walther:product-weapon
PPK:product-weapon
and:O
Russian:product-weapon
Makarov:product-weapon
PM:product-weapon
.:O