With no explanation, label each line with "O", "organization-company", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
was
not
until
Bill
Ruger
of
Sturm
,
Ruger
&
amp
;
Co
.
began
offering
the
Ruger
Model
77
RSM
Magnum
Mk
II
in
1991
that
the
cartridge
finally
took
off
.
It:O
was:O
not:O
until:O
Bill:organization-company
Ruger:organization-company
of:organization-company
Sturm:organization-company
,:O
Ruger:organization-company
&:organization-company
amp:organization-company
;:organization-company
Co:organization-company
.:organization-company
began:O
offering:O
the:O
Ruger:product-weapon
Model:product-weapon
77:product-weapon
RSM:product-weapon
Magnum:product-weapon
Mk:product-weapon
II:product-weapon
in:O
1991:O
that:O
the:O
cartridge:O
finally:O
took:O
off:O
.:O