With no explanation, label each line with "organization-showorganization", "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
1997
,
the
Birmingham
Royal
Ballet
became
independent
of
The
Royal
Ballet
in
London
.
In:O
1997:O
,:O
the:O
Birmingham:organization-showorganization
Royal:organization-showorganization
Ballet:organization-showorganization
became:O
independent:O
of:O
The:O
Royal:organization-showorganization
Ballet:organization-showorganization
in:O
London:location-GPE
.:O