With no explanation, label each line with "organization-other", "location-GPE", "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Towards
the
end
World
War
II
in
fierce
fighting
between
January
and
March
1945
the
Heiligenbeil
pocket
fell
to
the
Red
Army
.
Towards:O
the:O
end:O
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
II:event-attack/battle/war/militaryconflict
in:O
fierce:O
fighting:O
between:O
January:O
and:O
March:O
1945:O
the:O
Heiligenbeil:location-GPE
pocket:location-GPE
fell:O
to:O
the:O
Red:organization-other
Army:organization-other
.:O