With no explanation, label each line with "person-soldier", "O", "organization-government/governmentagency", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
His
regiment
was
assigned
to
the
northern
defenses
of
Washington
,
D.C
.
,
from
September
1862
until
May
1864
,
when
Lt.
Gen
.
Ulysses
S.
Grant
called
for
more
troops
to
support
his
Overland
Campaign
.
His:O
regiment:O
was:O
assigned:O
to:O
the:O
northern:O
defenses:O
of:O
Washington:organization-government/governmentagency
,:organization-government/governmentagency
D.C:organization-government/governmentagency
.:organization-government/governmentagency
,:O
from:O
September:O
1862:O
until:O
May:O
1864:O
,:O
when:O
Lt.:O
Gen:O
.:O
Ulysses:person-soldier
S.:person-soldier
Grant:person-soldier
called:O
for:O
more:O
troops:O
to:O
support:O
his:O
Overland:event-attack/battle/war/militaryconflict
Campaign:event-attack/battle/war/militaryconflict
.:O