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
hull
of
the
M60
was
a
single
piece
steel
casting
divided
into
three
compartments
,
with
the
driver
in
front
,
fighting
compartment
in
the
middle
and
engine
at
the
rear
.
The:O
hull:O
of:O
the:O
M60:product-weapon
was:O
a:O
single:O
piece:O
steel:O
casting:O
divided:O
into:O
three:O
compartments:O
,:O
with:O
the:O
driver:O
in:O
front:O
,:O
fighting:O
compartment:O
in:O
the:O
middle:O
and:O
engine:O
at:O
the:O
rear:O
.:O