What title is given to a leading female dancer in a ballet company, such as Anna Pavlova or Margot Fonteyn?

Ann Sothern was the voice of a 1928 Porter automobile on which cult sitcom? DNA tests in 1994 on Anna Anderson's preserved tissue proved she was not which Russian grand duchess? Anna Beth Sully, Mary Pickford and Lady Sylvia Ashley were all wives of which actor? Anna Ivanovna, empress of Russia from 1730 to 1740, was the niece of which ruler? Anna, the wife of which president, got a pension equal to his yearly salary despite his short term in 1841? Annapurna in Nepal was the highest mountain climbed until which peak was summited in 1953? Anne Bancroft won an Oscar playing which teacher in "The Miracle Worker"? Anne Bauchens edited films from 1918 until his death in 1959 for which director of "The Ten Commandments"?