With no explanation, label each line with "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
subsequently
returned
to
command
of
Fifth
Army
and
,
briefly
,
commanded
the
northern
sector
of
the
Eastern
Front
.
He:O
subsequently:O
returned:O
to:O
command:O
of:O
Fifth:organization-other
Army:organization-other
and:O
,:O
briefly:O
,:O
commanded:O
the:O
northern:O
sector:O
of:O
the:O
Eastern:O
Front:O
.:O