With no explanation, label each line with "location-GPE", "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
They
allegedly
promised
that
US
singer
R
Kelly
would
perform
at
the
concert
,
but
he
did
not
.
They:O
allegedly:O
promised:O
that:O
US:location-GPE
singer:O
R:person-artist/author
Kelly:person-artist/author
would:O
perform:O
at:O
the:O
concert:O
,:O
but:O
he:O
did:O
not:O
.:O