Question: Dorothy Gish's older sister was called what? 

Context paragraphs:
The Informer (1912 film): The Informer is a 1912 American dramatic short film directed by D. W. Griffith and featuring Mary Pickford, Henry B. Walthall, Harry Carey, Lionel Barrymore, Dorothy Gish and Lillian Gish.  It was filmed in the Pike County town of Milford, Pennsylvania.  Prints of the film survive at the film archive of the Library of Congress.

Romola (film): Romola is a 1924 American drama film directed by Henry King and shot on location in Italy.  The film stars Lillian Gish, Dorothy Gish, William Powell and Ronald Colman, and is based on the George Eliot novel of the same name.  A copy of the film survives at the UCLA Film and Television Archive.

Wolves (1930 film): Wolves is a 1930 British crime film directed by Albert de Courville and starring Charles Laughton, Dorothy Gish and Malcolm Keen.  A woman is captured by a gang of criminals operating in the Arctic but the leader later helps her escape.  It was based on a play by Georges Toudouze.  It was produced by Herbert Wilcox's British and Dominions Film Corporation, but filmed at the Blattner Studios whilst sound equipment was being installed at Wilcox's nearby Imperial Studios, and the sound was added after filming was completed.  It was Gish's first sound film, and was Laughton's second talkie (but his first sound drama), having completed a film of a musical variety performance earlier the same year.  Of 57 minutes original duration, it was released in 1936 in a 37-minute version retitled "Wanted Men".

Harry Hyde (actor): Harry Hyde was a silent film actor who appeared in 73 American films during the decade from 1910 to 1920, most notably as Mabel Normand's character's suitor in D.W. Griffith's 1911 drama "Her Awakening".  He also wrote the screenplay for "The Sentimental Sister", a Blanche Sweet vehicle produced in 1914.  As was frequently the case during the dawn of cinema, Hyde's roles ran the gamut from leading man to unbilled extra, sometimes in the same week.  He portrayed Mary's suitor in D.W. Griffith's "The Perfidy of Mary" (1913) with Dorothy Gish, Mae Marsh, and Lionel Barrymore; and played Blanche Sweet's character's cuckolded husband in Griffith's "Blind Love" (1912), in which she deserts her marriage for another man, has a baby, then realizes that she should have stayed with her husband (Hyde) and attempts to return to him.

Lillian Gish: Lillian Diana Gish (October 14, 1893 February 27, 1993) was an American actress of the screen and stage, as well as a director and writer.  Her film acting career spanned 75 years, from 1912, in silent film shorts, to 1987.  Gish was called the First Lady of American Cinema, and she is credited with pioneering fundamental film performing techniques.

Peppy Polly: Peppy Polly is a lost 1919 American silent drama film directed by Elmer Clifton and starring Dorothy Gish.  D. W. Griffith produced, as he did for several of Gish's films.

Dorothy Gish: Dorothy Elizabeth Gish (March 11, 1898 – June 4, 1968) was an American actress of the screen and stage, as well as a director and writer.  Dorothy and her older sister Lillian Gish were major movie stars of the silent era.  Dorothy also had great success on the stage, and was inducted into the American Theatre Hall of Fame.  Dorothy Gish was noted as a fine comedian, and many of her films were comedies.

The Dorothy and Lillian Gish Prize: The Dorothy and Lillian Gish Prize or Gish Prize is given annually to "a man or woman who has made an outstanding contribution to the beauty of the world and to mankind's enjoyment and understanding of life."  It is among the most prestigious and one of the richest prizes in the American arts.  The prize is currently valued at approximately $250,000.  The 2016 winner Elizabeth LeCompte received $300,000.  The founders Dorothy Gish (1898–1968) and Lillian Gish (1893–1993) were sisters, famous as actresses from the silent era of film and mid-century theatre.  About the prize, established in Lillian Gish's will, she said: "It is my desire, by establishing this prize, to give recipients of the prize the recognition they deserve, to bring attention to their contributions to society and encourage others to follow in their path."  It was established in 1994 by the Dorothy and Lillian Gish Prize Trust and is administered by JPMorgan Chase Bank.

An Unseen Enemy: An Unseen Enemy is a 1912 Biograph Company short silent film directed by D. W. Griffith, and was the first film to be made starring the actresses Lillian Gish and Dorothy Gish.  A critic of the time stated that "the Gish sisters gave charming performances in this one-reel film".  The film was shot in Fort Lee, New Jersey where early film studios in America's first motion picture industry were based at the beginning of the 20th century.

Mary Gish: Mary Robinson McConnell Gish (September 16, 1876 - September 16, 1948) was an American actress and the mother of Lilian and Dorothy Gish.

Supporting paragraphs: Dorothy Gish Lillian Gish
Answer: First Lady of American Cinema