Question: The Black Windmill is a film produced by a man best known for coproducing what? 

Context articles: Ken Fox
Generation on the Wind
David Brown (producer)
Scott Thorson
Artemus Ogletree
Reed Erickson
Isaac Roberts
The Black Windmill
George C. Parker
One Bull

Kenneth Allen Fox is an American business man best known as an entrepreneur and investor.
 He was a co-founder of Internet Capital Group who has gone on to form Stripes Group, Sentinel Fund, Syndero and A10 Capital.
Generation on the Wind is a 1979 documentary film produced by David Vassar and Andrew Finley.
 The film is a character study centered on a rag tag group of young artists, mechanics and environmental activists who successfully built the largest electrical generating windmill in the world.
 The documentary required two years of shooting to finish the film.
 It was nominated for an Academy Award for Best Documentary Feature.
David Brown (July 28, 1916 February 1, 2010) was an American film and theatre producer and writer who was best known for coproducing the 1975 film Jaws based on the best-selling novel by Peter Benchley.
Scott Thorson (born January 23, 1959) is an American man best known for his relationship with and lawsuit against the entertainer Liberace.
Artemus Ogletree (1900-1915 – January 5, 1935) was an American man best known for being murdered in room 1046 of the Hotel President in Kansas City.
Reed Erickson (1917-1992) was an American trans man best known for his philanthropy that, according to sociology specialist Aaron H Devor, largely informed "almost every aspect of work being done in the 1960s and 1970s in the field of transsexualism in the US and, to a lesser degree, in other countries."
Isaac Roberts (27 January 1829 – 17 July 1904) was a Welsh engineer and business man best known for his work as an amateur astronomer, pioneering the field of astrophotography of nebulae.
 He was a member of the Liverpool Astronomical Society in England and was a fellow of the Royal Geological Society.
 Roberts was also awarded the Gold Medal of the Royal Astronomical Society in 1895.
The Black Windmill is a 1974 British spy thriller film directed by Don Siegel and starring Michael Caine, John Vernon, Janet Suzman and Donald Pleasence.
 It was produced by Richard D. Zanuck and David Brown.
George C. Parker (March 16, 1860 – 1936) was an American con man best known for his surprisingly successful attempts to "sell" the Brooklyn Bridge.
 He made his living conducting illegal sales of property he did not own, often New York's public landmarks, to unwary immigrants.
 The Brooklyn Bridge was the subject of several of his transactions, predicated on the notion of the buyer controlling access to the bridge.
 Police removed several of his victims from the bridge as they tried to erect toll booths.
Henry Oscar One Bull (Lakota: "Tȟatȟáŋka Waŋžíla" in Standard Lakota Orthography) (circa 1853-1947) was a Lakota Sioux man best known for being the nephew and adopted son of the holy man, Sitting Bull.
 He was also the younger brother of White Bull, a famous Lakota warrior and chief contributor to Stanley Vestal's biography of their uncle.
 He wore his uncle's shield during the Battle of Little Bighorn.
 One Bull joined his uncle in fleeing to Canada following the Battle of the Little Bighorn in 1876.
 Sitting Bull's band remained in the "Grandmother's Country" until he surrendered in North Dakota in 1881.
 One Bull stood by Sitting Bull at his surrender.