Question: Yvonne Mounsey, the South African-American ballet dancer was known for the important roles she created in the works of which choreographer who co-founded the New York City Ballet?
Sentence (from "Yvonne Mounsey"): Yvonne Mounsey (2 September 1919 – 29 September 2012) was a South African-American ballet dancer and teacher.
Relevant evidence: Yes