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 ":".
A
small
number
of
T-34s
were
again
fitted
with
a
tank
version
of
the
ZiS-2
,
the
ZiS-4
,
but
it
could
not
fire
an
adequate
high-explosive
round
,
making
it
an
unsuitable
tank
gun
.
A:O
small:O
number:O
of:O
T-34s:product-weapon
were:O
again:O
fitted:O
with:O
a:O
tank:O
version:O
of:O
the:O
ZiS-2:product-weapon
,:O
the:O
ZiS-4:product-weapon
,:O
but:O
it:O
could:O
not:O
fire:O
an:O
adequate:O
high-explosive:O
round:O
,:O
making:O
it:O
an:O
unsuitable:O
tank:O
gun:O
.:O