Question: Both Richard Williams and Melville Shavelson served as President of the WGAw?

Context paragraphs:
Ike (miniseries): Ike is a 1979 television miniseries about the life of Dwight D. Eisenhower, with heavy concentration on the time he went to Europe during World War II to serve as Supreme Commander.  The screenplay by Melville Shavelson was based on Kay Summersby's 1948 memoir "Eisenhower Was My Boss" and her 1975 autobiography, "Past Forgetting: My Love Affair".  Directed by Boris Sagal and Melville Shavelson, the production starred Robert Duvall as Eisenhower and Lee Remick as Kay Summersby.  Film editors John Woodcock and Bill Lenny won an Eddie Award for their work and the series garnered five Emmy Award nominations.

Cast a Giant Shadow: Cast a Giant Shadow is a 1966 big-budget action film based on the life of Colonel Mickey Marcus, and stars Kirk Douglas, Senta Berger, Yul Brynner, John Wayne, Frank Sinatra and Angie Dickinson.  Melville Shavelson adapted, produced and directed.

Jimmy (musical): Jimmy is a musical with a score by Bill Jacob, lyrics by Patti Jacob and a book by Melville Shavelson and Morrie Ryskind.  The musical describes the rise and fall of New York City Mayor Jimmy Walker, whose career was marred by corruption it was a romanticized version of Walker's tenure as mayor as presented in the 1957 film "Beau James", starring Bob Hope.  The film was based on a biography of Walker, also titled "Beau James", written by Gene Fowler.

Melville Shavelson: Melville Shavelson (April 1, 1917 – August 8, 2007) was an American film director, producer, screenwriter, and author.  He was President of the Writers Guild of America, West (WGAw) from 1969 to 1971, 1979 to 1981, and 1985 to 1987.

Richard Williams (animator): Richard Edmund Williams (born March 19, 1933) is a Canadian–British animator, voice artist, and writer, best known for serving as animation director on Disney/Amblin's "Who Framed Roger Rabbit" and for his unfinished feature film "The Thief and the Cobbler".  He was also a film title sequence designer and animator; his most famous works in this field included the title sequences to "What's New, Pussycat? " (1965) and "A Funny Thing Happened on the Way to the Forum" (1966) and title and linking sequences in "The Charge of the Light Brigade" (1968).  He also animated the eponymous cartoon feline for two of the later "Pink Panther" films.

The Legend of Valentino: The Legend of Valentino is a 1975 American television film written and directed by Melville Shavelson.  It deals with real life events about the actor and sex symbol of the 1920s Rudolph Valentino.

The Great Houdini (film): The Great Houdinis a.k.a.  The Great Houdini is a 1976 American made-for-television biographical film which is a fictionalized account of the life of the Hungarian-American escape artist and entertainer Harry Houdini.  The film was written and directed by Melville Shavelson and features Paul Michael Glaser ("Starsky and Hutch") and Sally Struthers ("All in the Family") and originally aired on ABC on October 8, 1976.

The Other Woman (1983 film): The Other Woman is a 1983 television romantic comedy film directed by Melville Shavelson.  The film was originally broadcast on CBS.  It was the only television film directed by Shavelson that he did not also write.

Yours, Mine and Ours (1968 film): Yours, Mine and Ours is a 1968 film, directed by Melville Shavelson and starring Lucille Ball, Henry Fonda and Van Johnson.  Before its release, it had three other working titles: "The Beardsley Story", "Full House", and "His, Hers, and Theirs".

Mixed Company: Mixed Company is a 1974 comedy-drama film directed by Melville Shavelson and written by Shavelson and Mort Lachman.  It stars Barbara Harris, Joseph Bologna, Tom Bosley, Lisa Gerritsen, Dorothy Shay, Ruth McDevitt and Haywood Nelson.

Supporting paragraphs: Richard Williams (animator) Melville Shavelson
Answer: no