ballet

Ballet dancer <n>Maria Khoreva</n>. Photo by <n>Darian Volkova</n>.

Ballet dancer <n>Olga Kuraeva</n> of the <n>Bolshoi Ballet</n>.

A 1950s promotional photo of contortionist <n>Nita Borka</n>.

A portrait of ballet dancer <n>Lucie Apicella Howard</n>.

I am unable to process this request. The provided research sources are either irrelevant to the image or are broken links, and therefore contain no verifiable information about the image's subjects, creators, or context. According to the instructions, I cannot generate metadata without valid sources.