The Fatted Calf (French: Le veau gras) is a 1939 French comedy film directed by Serge de Poligny and starring Elvire Popesco, André Lefaur and Armand Bernard.
 It is based on a play by Bernard Zimmer.
 The film's sets were designed by Jacques Colombier and Robert Gys
Darren Benjamin Shepherd is an American screenwriter and film director.
 He was born in San Jose, CA and graduated with film and music degrees from San Jose State University.
The Star of Valencia (German: Der Stern von Valencia ) is a 1933 German drama film directed by Alfred Zeisler and starring Liane Haid, Peter Erkelenz and Ossi Oswalda.
 It was made in Mallorca, at the same time as a French-language version "L'étoile de Valencia" directed by Serge de Poligny.
Serge de Poligny (1903–1983) was a French screenwriter and film director.
Return to Paradise (French: Retour au paradis) is a 1935 French film directed by Serge de Poligny and starring Claude Dauphin, Mary Morgan and Marcel André.
 The film's sets were designed by Pierre Schild.
You Will Be My Wife (French: Vous serez ma femme) is a 1932 German comedy film directed by Carl Boese, Serge de Poligny and Heinz Hille and starring Alice Field, Roger Tréville and Lucien Baroux.
 It is the French-language version of UFA's "The Cheeky Devil".
Wyatt Earp's Revenge is a 2012 American Western film about the legendary lawman Wyatt Earp.
 It is a fictionalized account of an actual Old West event, the slaying of beautiful singer Dora Hand in Dodge City, Kansas, when Earp was a deputy there.
 In one of its many instances of dramatic license, the movie depicts Hand as Earp's sweetheart.
 The film's framing device is a reporter's interview with an aging Earp, who reminisces about the tragedy.
 (Val Kilmer plays the older Earp, while Shawn Roberts plays the younger one.)
 The film was released on March 6, 2012, in the United States.
 The film was produced by Jeff Schenck and Barry Barnholtz and directed by Michael Feifer.
 The screenplay was written by Darren Benjamin Shepherd.
The Phantom Baron (French:Le baron fantôme) is a 1943 French drama film directed by Serge de Poligny and starring André Lefaur, Odette Joyeux and Jany Holt.
Thirst of Men (French: La soif des hommes) is a 1950 French historical drama film directed by  Serge de Poligny and starring  Georges Marchal, Dany Robin and Andrée Clément.
 It was filmed and set in French Algeria.
Aces of the Turf (French: Les as du turf) is a 1932 French comedy sports film directed by Serge de Poligny and starring Paul Pauley, Alexandre Dréan and Josyane.
 It was made at Joinville Studios by the French subsidiary of Paramount Pictures.
 In 1935 it was released in the United States with the alternative title of Racetrack Winners.

Question: Are Darren Benjamin Shepherd and Serge de Poligny both screenwriters?
Answer: yes