With no explanation, label each line with "O", "product-weapon", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
1978
,
FÉG
added
a
folding
stock
AKMS
version
of
the
AK-63
to
their
catalogue
;
thereafter
,
the
fixed-stock
AK-63
became
known
as
the
AK-63F
(
Wooden
Stock
)
and
the
folding-stock
version
was
designated
AK-63D
(
Descent
)
.
In:O
1978:O
,:O
FÉG:organization-other
added:O
a:O
folding:O
stock:O
AKMS:product-weapon
version:O
of:O
the:O
AK-63:product-weapon
to:O
their:O
catalogue:O
;:O
thereafter:O
,:O
the:O
fixed-stock:O
AK-63:product-weapon
became:O
known:O
as:O
the:O
AK-63F:product-weapon
(:O
Wooden:O
Stock:O
):O
and:O
the:O
folding-stock:O
version:O
was:O
designated:O
AK-63D:product-weapon
(:O
Descent:O
):O
.:O