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
ISU-152
had
different
versions
,
with
changes
in
the
gun
(
later
versions
)
,
the
number
of
hatches
,
or
the
hull
(
based
on
the
hull
of
the
IS-1
,
IS-2
or
IS-2
model
1944
tanks
)
.
The:O
ISU-152:product-weapon
had:O
different:O
versions:O
,:O
with:O
changes:O
in:O
the:O
gun:O
(:O
later:O
versions:O
):O
,:O
the:O
number:O
of:O
hatches:O
,:O
or:O
the:O
hull:O
(:O
based:O
on:O
the:O
hull:O
of:O
the:O
IS-1:product-weapon
,:O
IS-2:product-weapon
or:O
IS-2:product-weapon
model:product-weapon
1944:product-weapon
tanks:product-weapon
):O
.:O