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?
George Balanchine
Title: George Balanchine
Passage: George Balanchine (born Giorgi Melitonovich Balanchivadze; January 22, 1904April 30, 1983) was a choreographer.  Styled as the father of American ballet, he co-founded the New York City Ballet and remained its Artistic Director for more than 35 years.
Title: Heather Watts
Passage: Heather Watts (born September 27, 1953), was a principal ballerina with New York City Ballet.  A native of California, Ms. Watts was born as Linda Heather Watts in Long Beach on September 27, 1953.  As a little girl, she was a troublemaking child.  She had always wanted to be an actress.  An acting coach advised her taking ballet classes, seeing as she was incredibly dramatic (and clumsy).  She started dancing at the age of 10, came to New York at the age of 13 on a Ford Foundation summer scholarship to attend the School of American Ballet, the official school of the New York City Ballet.  She moved permanently to New York at age 15, again on a Ford Foundation scholarship to the School of American Ballet.  Watts joined the New York City Ballet in 1970 and was promoted to principal dancer by company founder George Balanchine in 1979.  George Balanchine took Watts into his companies "because he would not let such a talent disappear."  During Ms. Watts's tenure with the company, she had numerous principal roles created for her by George Balanchine, Jerome Robbins, and Peter Martins among others.  Mr. Balanchine gave Ms. Watts the principal roles in many of his existing masterpieces, including "Agon", Concerto Barocco, "Apollo", Symphony in C, "Theme and Variations" and "Serenade".  Ms. Watts performed around the world and starred in numerous "Dance in America" television programs, and she performed opposite frequent partner Mikhail Baryshnikov at the White House in a national televised performance of Balanchine's "Rubies" for President and Mrs. Carter.  Ms. Watts retired from the stage in a gala performance at Lincoln Center in 1995.
Title: Yvonne Mounsey
Passage: Yvonne Mounsey (2 September 1919 – 29 September 2012) was a South African-American ballet dancer and teacher.  Described as "a dancer of glamour, wit, and striking presence," she spent ten years with the New York City Ballet (1949-1959), where she created important roles in the works of George Balanchine and Jerome Robbins.
George Balanchine Yvonne Mounsey