Question: Don Bradman, who was in the movie The Flying Doctor, was known as the greatest what of all time?

Context paragraphs:
The Flying Doctor: The Flying Doctor is a 1936 Australian-British drama film directed by Miles Mander and starring Charles Farrell, Mary Maguire and James Raglan.  The Royal Flying Doctor Service of Australia operate in the Australian Outback.  Australian cricketer Don Bradman appears as himself during the film.

Don Bradman: Sir Donald George Bradman, AC (27 August 1908 – 25 February 2001), often referred to as "The Don", was an Australian cricketer, widely acknowledged as the greatest batsman of all time.  Bradman's career Test batting average of 99.94 is often cited as the greatest achievement by any sportsman in any major sport.

The Flying Doctors: The Flying Doctors is an Australian drama TV series produced by Crawford Productions that revolves around the everyday lifesaving efforts of the Royal Flying Doctor Service of Australia, starring Andrew McFarlane as the newly arrived Dr. Tom Callaghan.  The popular series ran for nine seasons and was successfully screened internationally.

Royal Flying Doctor Service (TV series): The Royal Flying Doctor Service or RFDS, was an Australian television series on the Nine Network based on the work of the Royal Flying Doctor Service of Australia.

John Grieve Woods: John Grieve Woods (17 January 1900 – 27 April 1980) was an Australian general practitioner and soldier.  Woods was born in Albury, New South Wales and died in Newcastle, New South Wales.  He was the son of Dr. William Cleaver Woods, the noted pioneer in Australian radiology and x-rays.  Woods was known by many as "the Flying Doctor" for his years of service in the Royal Flying Doctor Service of Australia.

Royal Flying Doctor Service of Australia: The Royal Flying Doctor Service of Australia (RFDS, informally known as The Flying Doctor) is one of the largest and most comprehensive aeromedical organisations in the world.  It provides emergency and primary health care services for those living in rural, remote and regional areas of Australia.  It is a not-for-profit organisation which provides health care to people who cannot access a hospital or general practice due to the vast distances of the Outback.

Wylie Gibbs: Wylie Talbot Gibbs (born 26 July 1922) was an Australian politician.  Born in Queensland, he was educated at Ipswich Boys' Grammar School and the University of Queensland before becoming a doctor and grazier.  He was a doctor with the Royal Flying Doctor Service 1947-48 and was a house surgeon in London, England, 1949-51.  From 1953-64 he was a surgeon in Ipswich and Brisbane.  In 1963 he was elected to the Australian House of Representatives as the Liberal member for Bowman, defeating Labor member Jack Comber.  He held the seat until his defeat in 1969, after which he became Executive Director of the Australian Pharmaceuticals Manufacturers' Association.

Back of Sunset: Back of Sunset is a 1959 Australian novel from Jon Cleary.  It is about Dr Stephen McCabe, Sydney doctor who takes a working holiday with the Royal Flying Doctor Service in Western Australia.  When the doctor who runs the practice is injured, McCabe must step up in his absence as he deals with a variety of crises.  The book received good reviews abroad.

Clyde Fenton: Clyde Cornwall Fenton OBE (16 May 1901 – 28 February 1982) was the Northern Territory's first flying doctor.  Unlike the other doctors with the Royal Flying Doctor Service of Australia, Fenton was also his own pilot.  Fenton was a self-taught pilot, and flew without the aid of any navigation equipment, air charts, and often proper landing strips.  He enjoys a particular renown as a unique and dashing Territory character.

List of The Flying Doctors episodes: "The Flying Doctors" was an Australian drama series produced by Crawford Productions that revolved around the everyday lifesaving efforts of the real Royal Flying Doctor Service of Australia.  It ran for nine seasons from May 1986 until August 1991.  After a successful miniseries in 1985, 221 further episodes were produced.

Supporting paragraphs: The Flying Doctor Don Bradman
Answer: batsman