The Ten-Year Lunch: The Wit and Legend of the Algonquin Round Table is a 1987 American documentary film about the Algonquin Round Table, a floating group of writers and actors in the "Roaring Twenties" in New York City, which included great names such as Dorothy Parker, Robert Benchley, George S. Kaufman, Edna Ferber, Marc Connelly, Harold Ross and Harpo Marx.
 It was produced and directed by Aviva Slesin and narrated by Heywood Hale Broun.
Our Mrs. McChesney is a lost 1918 American silent comedy drama film produced and distributed by Metro Pictures, directed by Ralph Ince, and based on the 1915 play by Edna Ferber and George Hobart which starred Ethel Barrymore.
Hermynia Zur Mühlen, or Hermynia zur Mühlen, born as Hermine Isabelle Maria Gräfin Folliot de Crenneville, also Folliot de Crenneville-Poutet (December 12, 1883 – March 20, 1951) was an Austrian writer and translator.
 She translated over seventy books into German from English, Russian and French, including work by Upton Sinclair, John Galsworthy, Jerome K. Jerome, Harold Nicolson, Max Eastman and Edna Ferber.
 She has been characterised as "one of the best known women writers of the Weimar Republic."
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 A committed socialist from a Viennese aristocratic Catholic family, she was sometimes called the Red Countess.
The Land Is Bright is a 1941 dramatic play by George S. Kaufman and Edna Ferber.
Dorothy Parker (August 22, 1893 – June 7, 1967) was an American poet, short story writer, critic, and satirist, best known for her wit, wisecracks and eye for 20th-century urban foibles.
A Peculiar Treasure is an autobiography by American author Edna Ferber.
 The book was first published in 1938 by Doubleday, Doran, & Co. at 398 pages long.
 The book is Ferber's first autobiography, and recounts her small-town, Midwest childhood, and her subsequent rise to authorship and the Pulitzer Prize.
 Her ascent from night-court reporter at a small-town newspaper to the author of So Big is set against the rising tensions in Europe and upsurging anti-semitism in the US.
The James Adams Floating Theatre was a floating theatre founded in 1914 by James Adams and his wife Beulah, which toured Chesapeake Bay staging theatre in Maryland, Virginia, and North Carolina.
 It was visited by Edna Ferber while writing the 1926 novel which inspired Jerome Kern and Oscar Hammerstein II’s Broadway show "Show Boat".
Personality Plus is an early novel by American author Edna Ferber.
 Originally published in 1914, "Personality Plus" is the second of three volumes chronicling the travels and events in the life of Emma McChesney.
 Ferber achieved her first successes with a series of stories centering on this character, a stylish and intelligent divorced mother who rises rapidly in business.
Dorothy Parker Drank Here Productions is the production company created in 1996 by Amy Sherman-Palladino to produce "Love and Marriage."
 The company also produced "Gilmore Girls", "The Return of Jezebel James", and "Bunheads".
 The name "Dorothy Parker Drank Here" is tribute to writer Dorothy Parker, a major influence on Palladino.
Edna Ferber (August 15, 1885 – April 16, 1968) was an American novelist, short story writer and playwright.
 Her novels included the Pulitzer Prize-winning "So Big" (1924), "Show Boat" (1926; made into the celebrated 1927 musical), "Cimarron" (1929; made into the 1931 film which won the Academy Award for Best Picture), "Giant" (1952; made into the 1956 Hollywood movie) and "Ice Palace" (1958) filmed in 1960

Question: Are  Edna Ferber and Dorothy Parker both writers?
Answer: yes