With no explanation, label each line with "organization-other", "O", "product-weapon", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Towards
the
end
of
the
Korean
War
the
US
Army
replaced
the
M41
self-propelled
howitzer
with
the
M44
self-propelled
howitzer
.
Towards:O
the:O
end:O
of:O
the:O
Korean:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
the:O
US:organization-other
Army:organization-other
replaced:O
the:O
M41:product-weapon
self-propelled:product-weapon
howitzer:product-weapon
with:O
the:O
M44:product-weapon
self-propelled:product-weapon
howitzer:product-weapon
.:O