With no explanation, label each line with "O", "location-GPE", "building-theater", "person-other", "art-other", "art-broadcastprogram", "art-film", "art-music", "art-painting" or "art-writtenart" preceded by ":".
She
made
her
debut
at
the
Royal
Opera
House
in
London
,
as
the
Woodbird
in
``
Siegfried
``
,
in
1953
.
She:O
made:O
her:O
debut:O
at:O
the:O
Royal:building-theater
Opera:building-theater
House:building-theater
in:O
London:location-GPE
,:O
as:O
the:O
Woodbird:person-other
in:O
``:O
Siegfried:art-other
``:O
,:O
in:O
1953:O
.:O