With no explanation, label each line with "organization-showorganization", "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
1988
he
formed
a
bluesy
rock
quartet
called
Ultra
Blue
with
his
wife
Glenda
who
sang
backups
for
Robert
and
occasionally
sang
lead
.
In:O
1988:O
he:O
formed:O
a:O
bluesy:O
rock:O
quartet:O
called:O
Ultra:organization-showorganization
Blue:organization-showorganization
with:O
his:O
wife:O
Glenda:person-artist/author
who:O
sang:O
backups:O
for:O
Robert:person-artist/author
and:O
occasionally:O
sang:O
lead:O
.:O