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 ":".
However
,
sometimes
the
term
``
Black
and
Tans
''
covered
both
groups
.
However:O
,:O
sometimes:O
the:O
term:O
``:O
Black:O
and:O
Tans:O
'':O
covered:O
both:O
groups:O
.:O