Question: Robert Benton and Tom Walls both worked which role in the making of a movie?

Context articles: Canaries Sometimes Sing
Foreign Affaires
Turkey Time (film)
Tom Walls
Robert Benton
For Valour (1937 film)
Aldwych farce
A Night Like This (film)
Plunder (1931 film)
Second Best Bed

Canaries Sometimes Sing is a 1930 British romantic comedy film, directed by Tom Walls.
 The film is a four-hander, starring Walls, Cathleen Nesbitt, Athole Stewart and Yvonne Arnaud.
 It is a screen version of the witty and sophisticated comedy of manners play by Frederick Lonsdale, which had been a big critical and popular success when premiered at London's Globe Theatre in 1929, with Stewart and Arnaud cast in the roles which they would recreate in the film.
 A surviving review of the film notes favourably: "Glittering, superficial, but very skilful...superbly played."
Foreign Affaires is a 1935 British comedy film directed by and starring Tom Walls.
 It also features Ralph Lynn, Robertson Hare, Norma Varden and Cecil Parker.
 The screenplay is by Ben Travers, and the cast included cast members from the Walls and Travers Aldwych Farces.
 The film is set on the French Riviera where two hard-living British spongers become mixed up in illegal gambling.
Turkey Time is a 1933 British comedy film directed by Tom Walls and starring Walls, Ralph Lynn, Robertson Hare and Dorothy Hyson.
 A group of guests come to stay with the Stoatt family in the seaside town of Eden Bay for Christmas.
 They soon become involved with an impoverished concert performer whose innocent presence in the house leads to a series of misunderstandings.
 It was adapted from the 1931 play "Turkey Time" by Ben Travers, one of the Aldwych Farces.
Tom Kirby Walls (18 February 1883 – 27 November 1949) was an English stage and film actor, producer and director, best known for presenting and co-starring in the Aldwych farces in the 1920s and for starring in and directing the film adaptations of those plays in the 1930s.
Robert Douglas Benton (born September 29, 1932) is an American screenwriter and film director.
 He won the Oscars for Best Adapted Screenplay and Best Director for "Kramer vs. Kramer" (1979) and won a third Oscar for Best Original Screenplay for "Places in the Heart" (1984).
For Valour is a 1937 British comedy film directed by Tom Walls and starring Walls, Ralph Lynn and Veronica Rose.
 It was made at Shepperton Studios, with sets designed by Oscar Werndorff.
 Unlike previous films starring Walls and Lynn, it was based on an original screenplay rather than one of the Aldwych Farces.
 Both Walls and Lynn played dual roles of two Boer War veterans and their son and grandson respectively.
 It was the last time the two actors, who had been one of the most popular film comedy teams of the decade, appeared together on screen.
The Aldwych farces were a series of twelve stage farces presented at the Aldwych Theatre, London, nearly continuously from 1923 to 1933.
 All but three of them were written by Ben Travers.
 They incorporate and develop British low comedy styles, combined with clever word-play.
 The plays were presented by the actor-manager Tom Walls and starred Walls and Ralph Lynn, supported by a regular company that included Robertson Hare, Mary Brough, Winifred Shotter, Ethel Coleridge and Gordon James.
A Night Like This is a 1932 comedy film directed by Tom Walls and starring Walls, Ralph Lynn and Winifred Shotter.
 With a script by Ben Travers it is a screen adaptation of the original 1930 Aldwych farce of the same title.
Plunder is a 1931 British comedy film directed by and starring Tom Walls.
 It also features Ralph Lynn, Winifred Shotter and Robertson Hare.
 It was based on the original stage farce of the same title, and was the second in a series of film adaptations of Aldwych farces by Ben Travers, adapted in this case by W. P. Lipscomb, and was a major critical and commercial success helping to cement Walls's position as one of the leading stars of British cinema.
Second Best Bed is a 1938 British comedy film directed by Tom Walls and starring Walls, Jane Baxter and Veronica Rose.
 The screenplay is by Ben Travers, based on an earlier story of his.
 Walls and Travers had worked together on the Aldwych farces.
 The screenplay concerns a newly married couple who soon run into domestic difficulties when the wife refuses to obey her husband's every order.