Question: Which American dancer did Viviane Gauthier study under?

Context paragraphs:
Matteo Vittucci: Matteo Vittucci (1919 – 2011) was an American dancer, choreographer, teacher, and scholar.  He graduated from Cornell University with a B.S. and later received an M.A. in Dance Education from Springfield College.  Having trained at the Metropolitan Opera Ballet School, Matteo (who went by only his first name professionally) began his career as a ballet dancer with the Metropolitan Opera Ballet.  In 1953, he made his first appearance as an ethnic dance soloist - ethnic-dance, rather than ballet, became his area of expertise.  Matteo studied with ethnic-dance experts such as La Meri and went on to study, present, and teach numerous traditional dance forms from nations such as Japan, India, and Spain.  He is the author of "The Language of Spanish Dance: A Dictionary and Reference Manual" as well as "Woods that Dance," a study of the use of castanets.

George Gauthier (American football): George E. "Gooch" Gauthier (February 3, 1890 – August 11, 1964) was an American football and basketball player, athletic coach, and college athletics administrator.  He served as the head football coach at Michigan Agricultural College, now Michigan State University, in 1918 and at Ohio Wesleyan University from 1921 to 1946, compiling a career record of 125–101–15.  Gauthier was also the head basketball coach at Michigan Agricultural from 1916 to 1920 and at Ohio Wesleyan for the 1945–1946 season, tallying a career mark of 47–46.

Frédérik Gauthier: Frédérik Gauthier (born April 26, 1995) is a Canadian professional ice hockey player.  He is currently playing in the Toronto Maple Leafs organization of the National Hockey League (NHL).  He was selected by the Maple Leafs in the 1st round (21st overall) of the 2013 NHL Entry Draft.  Gauthier is a top prospect who was ranked number eight on the NHL Central Scouting Bureau's final ranking of North American skaters.  He fulfilled the expectation to be a first round selection at the 2013 NHL Entry Draft.  He was born in Laval, Quebec, a suburb of Montreal.

Gertrude Prokosch Kurath: Gertrude Prokosch Kurath (1903–1992) was an American dancer, researcher, author, and ethnomusicologist.  She researched and wrote extensively on the study of dance, co-authoring several books and writing hundreds of articles.  Her main areas of interest were ethnomusicology and dance ethnology, with some of her best known works being "Panorama of Dance Ethnology" in "Current Anthropology" (1960), the book "Music and dance of the Tewa Pueblos" co-written with Antonio Garcia (1970), and "Iroquois Music and Dance: ceremonial arts of two Seneca Longhouses" (1964), in the "Smithsonian Institution Bureau of American Ethnology bulletin".  She made substantial contributions to the study of Amerindian dance, and to dance theory.  From 1958 to January 1972 she was dance editor for the journal "Ethnomusicology".

Katherine Dunham: Katherine Mary Dunham (also known as Kaye Dunn, June 22, 1909 – May 21, 2006) was an American dancer, choreographer, author, educator, and social activist.  Dunham had one of the most successful dance careers in American and European theater of the 20th century, and directed her own dance company for many years.  She has been called the "matriarch and queen mother of black dance."

Viviane Gauthier: Viviane (or Vivianne) Gauthier (March 17, 1918 – June 1, 2017) was a Haitian dancer and teacher of Haitian folkloric dance who studied Haitian folklore with Katherine Dunham-trained Lavinia Williams of which she is considered the heir.  She eventually opened the Viviane Gauthier School of Dance in Port-au-Prince, Haiti.

Eric Gauthier (dancer): Eric Gauthier (dancer) (*1977) is a Canadian-born dancer, choreographer and musician.  After a soloist career at the Stuttgart Ballet he founded Gauthier Dance/ /Dance Company at the Theaterhaus Stuttgart in 2007.  In 2011, he won the German Dance Prize Deutscher Tanzpreis.

Viviane Porto: Viviane Porto Silva (born January 2, 1980) is a Brazilian actress and former classical dancer.

Julien Gauthier: Julien Gauthier (born October 15, 1997) is a Canadian ice hockey player, currently playing with the Charlotte Checkers of the American Hockey League (AHL) as a prospect to the Carolina Hurricanes of the National Hockey League (NHL).  Gauthier was drafted 21st overall by the Hurricanes in the 2016 NHL Entry Draft.

Francesca Harper: Francesca Harper (born 1969) is an American dancer and choreographer.  She is the daughter of dancer and educator Denise Jefferson and niece of Pulitzer Prize winning writer Margo Jefferson.  Harper was named a scholar of the arts in the Presidential Scholars Program in 1987.  She studied at the School of American Ballet and the Joffrey Ballet School and went on to become the principal dancer in William Forsythe’s Ballet Frankfurt from 1994-1999.  She was a ballet consultant for the film Black Swan, and has appeared as a dancer in the television series Boardwalk Empire.  In 2005, she founded the non-profit dance company The Francesca Harper Project.  Long Island University honored her with a "Living History" award during Black History Month in 2013.

Supporting paragraphs: Viviane Gauthier Katherine Dunham
Answer: Katherine Dunham