Alex Gibney
Philip Alexander Gibney( born October 23, 1953) is an American documentary film director and producer.
In 2010," Esquire" magazine said Gibney" is becoming the most important documentarian of our time".
His works as director include" Going Clear: Scientology and the Prison of Belief"( winner of three Emmys in 2015),,( the winner of three 2013 primetime Emmy awards),( nominated in 2005 for Academy Award for Best Documentary Feature);( short- listed in 2011 for the Academy Award for Best Documentary Feature);" Casino Jack and the United States of Money"; and" Taxi to the Dark Side"( winner of the 2007 Academy Award for Best Documentary Feature), focusing on a taxi driver in Afghanistan who was tortured and killed at Bagram Air Force Base in 2002.
In 2019 he released his newest documentary Citizen K, about Russian President Vladimir Putin and the Russian billionaire exile Mikhail Khodorkovsky.
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).
Pirates of the Prairie
Pirates of the Prairie is a 1942 Western film inspired by the Banditti of the Prairie.
The Prairie (film)
The Prairie is a 1947 American western film based on the novel" The Prairie" by James Fenimore Cooper.
Moonlight on the Prairie
Moonlight on the Prairie is a 1935 American Western film directed by D. Ross Lederman.
It was the first of a Warner Bros. singing cowboy film series with Dick Foran and his Palomino Smoke.
A print is preserved in the Library of Congress collection.
Dan Milne
Dan Milne is a British actor/ director who is possibly best known for his role in" EastEnders".
Zero Days
Zero Days is a 2016 American documentary film directed by Alex Gibney.
It was selected to compete for the Golden Bear at the 66th Berlin International Film Festival.
D. Ross Lederman
David Ross Lederman (December 12, 1894 – August 24, 1972) was an American film director noted for his Western/action/adventure films of the 1930s and 1940s.
Starting out as an extra in Mack Sennett's Keystone Cops series, Lederman worked his way through the ranks of film production, and first made his mark as a second-unit director.
He directed several B-Western serials in the early 1930s, such as "Two-Fisted Law" and "Texas Cyclone" both 1932, in which he worked with Tim McCoy and a young John Wayne.
Becoming a full feature director in the late 1930s, Lederman specialized in action films and especially westerns, continuing to produce films with McCoy at Columbia Pictures.
Ben Palmer
Ben Palmer is a British film and television director who is known for being the director of" Bo' Selecta" and" The Inbetweeners".
Scotty Fox
Scott Fox is a pornographic film director who is a member of the AVN Hall of Fame.

Question: Which film has the director who is older than the other, Zero Days or Moonlight On The Prairie? 
Answer: Moonlight On The Prairie