Question: Where did the director of film Man Detained graduate from?

Context paragraphs:
title: Peter Levin
paragraph_text: Peter Levin is an American director of film, television and theatre.
title: The Seventh Company Outdoors
paragraph_text: The Seventh Company Outdoors is a 1977 French comedy film directed by Robert Lamoureux. It is a sequel to Now Where Did the 7th Company Get to ?.
title: Dana Blankstein
paragraph_text: Dana Blankstein- Cohen( born March 3, 1981) is the director of the Israeli Academy of Film and Television. She is a film director, and an Israeli culture entrepreneur.
title: Olav Aaraas
paragraph_text: Olav Aaraas( born 10 July 1950) is a Norwegian historian and museum director. He was born in Fredrikstad. From 1982 to 1993 he was the director of Sogn Folk Museum, from 1993 to 2010 he was the director of Maihaugen and from 2001 he has been the director of the Norwegian Museum of Cultural History. In 2010 he was decorated with the Royal Norwegian Order of St. Olav.
title: Brian Kennedy (gallery director)
paragraph_text: Brian Patrick Kennedy( born 5 November 1961) is an Irish- born art museum director who has worked in Ireland and Australia, and now lives and works in the United States. He is currently the director of the Peabody Essex Museum. He was the director of the Toledo Museum of Art in Ohio from 2010 to 2019. He was the director of the Hood Museum of Art from 2005 to 2010, and the National Gallery of Australia( Canberra) from 1997- 2004.
title: The Dark Man (film)
paragraph_text: The Dark Man( AKA" Man Detained") is a 1951 British black and white, film- noir, thriller, crime, drama, film, from Rank Studios, written and directed by Jeffrey Dell, and starring Edward Underdown, Maxwell Reed and Natasha Parry.
title: Robert Tronson
paragraph_text: Robert Tronson (18 May 1924 – 27 November 2008) was an English film and television director, born in Chilmark, Wiltshire. Educated at Churcher's College in Hampshire, followed by the Royal Naval College, Dartmouth, he served with the Royal Navy from 1941. After leaving the service at the end of the Second World War he determined to become a writer, but soon joined the BBC, where he produced children's television programmes. In 1955 he joined Associated-Rediffusion, and by the end of the decade he was working on television drama serials. From the 1960s onwards he worked as a freelance director in a career spanning almost 50 years. His final television credits were for directing five episodes of "Hetty Wainthropp Investigates" for the BBC, between 1996 and 1998. In 1965 Tronson married Nona Richards (died 1987). He died on 27 November 2008 and was survived by their son.
title: Now Where Did the 7th Company Get to?
paragraph_text: Now Where Did the 7th Company Get To? is a 1973 French- Italian comedy war film directed by Robert Lamoureux. The film portrays the adventures of a French Army squad lost somewhere on the front in May 1940 during the Battle of France.
title: Ian Barry (director)
paragraph_text: Ian Barry is an Australian director of film and TV.
title: Man Detained
paragraph_text: Man Detained is a 1961 British crime film directed by Robert Tronson and starring Bernard Archard, Elvi Hale and Paul Stassino. Part of the long-running series of Edgar Wallace Mysteries films made at Merton Park Studios, it is loosely based on the 1916 novel "A Debt Discharged" by Edgar Wallace. The film's sets were designed by the art director Peter Mullins.

Reasoning steps:
Man Detained director Robert Tronson
Robert Tronson educated at Churcher's College

Answer: spans: Churcher's College