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
M4
Sherman
was
a
medium
tank
that
proved
itself
in
the
Allied
operations
of
every
theater
of
World
War
II
.
The:O
M4:product-weapon
Sherman:product-weapon
was:O
a:O
medium:O
tank:O
that:O
proved:O
itself:O
in:O
the:O
Allied:O
operations:O
of:O
every:O
theater:O
of:O
World:product-weapon
War:product-weapon
II:product-weapon
.:O