With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
By
the
end
of
June
1865
,
all
Confederate
armies
had
surrendered
and
the
Confederacy
's
government
had
collapsed
.
By:O
the:O
end:O
of:O
June:O
1865:O
,:O
all:O
Confederate:O
armies:O
had:O
surrendered:O
and:O
the:O
Confederacy:O
's:O
government:O
had:O
collapsed:O
.:O