With no explanation, label each line with "event-attack/battle/war/militaryconflict", "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
even
proved
vulnerable
to
the
M51
Super
Sherman
,
an
upgraded
variant
of
the
M4
Sherman
of
World
War
II
.
It:O
even:O
proved:O
vulnerable:O
to:O
the:O
M51:product-weapon
Super:product-weapon
Sherman:product-weapon
,:O
an:O
upgraded:O
variant:O
of:O
the:O
M4:product-weapon
Sherman:product-weapon
of:O
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
II:event-attack/battle/war/militaryconflict
.:O