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 ":".
The
gun
has
a
mechanical
safety
located
on
the
left
side
,
above
the
pistol
handle
and
open
non
adjustable
sights
.
The:O
gun:O
has:O
a:O
mechanical:O
safety:O
located:O
on:O
the:O
left:O
side:O
,:O
above:O
the:O
pistol:O
handle:O
and:O
open:O
non:O
adjustable:O
sights:O
.:O