With no explanation, label each line with "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
performance
was
part
of
an
event
titled
``
Costello
Sings
Lowe
,
Nick
Sings
Elvis
–
A
Rare
Bashing
of
Each
Other
's
Songs
''
,
where
Lowe
and
Costello
performed
each
other
's
songs
.
The:O
performance:O
was:O
part:O
of:O
an:O
event:O
titled:O
``:O
Costello:person-artist/author
Sings:O
Lowe:person-artist/author
,:O
Nick:person-artist/author
Sings:O
Elvis:person-artist/author
–:O
A:O
Rare:O
Bashing:O
of:O
Each:O
Other:O
's:O
Songs:O
'':O
,:O
where:O
Lowe:person-artist/author
and:O
Costello:person-artist/author
performed:O
each:O
other:O
's:O
songs:O
.:O