Elliot Silverstein
Elliot Silverstein( born August 3, 1927, in Boston, Massachusetts) is an American director, who is best known for being the director of the movie" Cat Ballou"( 1965).
Dig Your Grave Friend... Sabata's Coming
Dig Your Grave Friend ...
Sabata's Coming is a 1971 Spanish western film directed by Juan Bosch and starring by Richard Harrison, Fernando Sancho and Raf Baldassarre.
It was scored by Enrique Escobar.
Constantin J. David
Constantin J. David (18 February 1886 – 19 February 1964) was a German journalist, film director, film producer, and actor.
He is also known for his marriage to the Hungarian actress, singer, and model Käthe von Nagy.
Ben Palmer
Ben Palmer is a British film and television director who is known for being the director of" Bo' Selecta" and" The Inbetweeners".
I Spit on Your Grave 2
I Spit on Your Grave 2 is a 2013 American rape and revenge horror film directed by Steven R. Monroe.
It is a standalone sequel to the 2010 film" I Spit on Your Grave", also directed by Monroe, which in turn was based on Meir Zarchi's 1978 film of the same name.
The film was given a limited theatrical release at one theater and has been received negatively by critics.
I Spit on Your Grave: Deja Vu
I Spit on Your Grave:
Deja Vu is an American horror-thriller directed by Meir Zarchi.
It stars Camille Keaton and Jamie Bernadette, and is a direct sequel to the 1978 film "I Spit on Your Grave".
The Glass Boat
The Glass Boat( French: Le bateau de verre, German: Das brennende Schiff) is a 1927 French- German silent film directed by Constantin J. David and Jacqueline Milliet and starring André Nox, Françoise Rosay and Eric Barclay.
The film's sets were designed by the art director Karl Görge.
Joan Bosch
Joan Bosch Palau( 31 May 1925- 17 November 2015) was a Spanish film director and screenwriter.
In 1946 he travelled to Morocco to work as military at the same time he was directing" Las aventuras del capitán Guido"( 1946).
He returned to Madrid and he worked as screenwriter with Antonio del Amo.
He died on 18 November 2015.
And the Crows Will Dig Your Grave
And the Crows Will Dig Your Grave is a 1971 Spanish western film directed by Juan Bosch and starring Craig Hill, Fernando Sancho and Dominique Boschero.
It is composed by Bruno Nicolai.
I Spit on Your Grave III: Vengeance Is Mine
I Spit on Your Grave III: Vengeance Is Mine is a 2015 American rape and revenge horror film, directed by R.D. Braunstein from a screenplay by Daniel Gilboy.
It is the third installment in the series.
Sarah Butler reprises her role as Jennifer Hills from the 2010 film" I Spit on Your Grave".

Question: Which film has the director who is older than the other, Dig Your Grave Friend... Sabata'S Coming or The Glass Boat? 
Answer: The Glass Boat