With no explanation, label each line with "location-GPE", "O", "organization-other", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
On
13
July
Hitler
summoned
Field
Marshall
Erich
von
Manstein
to
his
headquarters
,
the
Wolfsschanze
in
East
Prussia
.
On:O
13:O
July:O
Hitler:person-other
summoned:O
Field:O
Marshall:O
Erich:person-other
von:person-other
Manstein:person-other
to:O
his:O
headquarters:O
,:O
the:O
Wolfsschanze:organization-other
in:O
East:location-GPE
Prussia:location-GPE
.:O