With no explanation, label each line with "location-other", "O", "person-artist/author", "art-other", "art-broadcastprogram", "art-film", "art-music", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Williams
appeared
as
a
guest
vocalist
on
Michael
Ball
's
'
Past
and
Present
'
concert
tour
,
which
was
filmed
for
DVD
at
the
Royal
Albert
Hall
.
Williams:person-artist/author
appeared:O
as:O
a:O
guest:O
vocalist:O
on:O
Michael:person-artist/author
Ball:person-artist/author
's:O
':O
Past:art-other
and:art-other
Present:art-other
':O
concert:O
tour:O
,:O
which:O
was:O
filmed:O
for:O
DVD:O
at:O
the:O
Royal:location-other
Albert:location-other
Hall:location-other
.:O