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 ":".
The
B-13
gun
fired
a
shell
at
a
muzzle
velocity
of
,
which
gave
them
a
range
of
.
The:O
B-13:product-weapon
gun:product-weapon
fired:O
a:O
shell:O
at:O
a:O
muzzle:O
velocity:O
of:O
,:O
which:O
gave:O
them:O
a:O
range:O
of:O
.:O