Question: When did Baird cease showing its programs on the channel of the company Bill Greenslade works for?

full_context: Document 1: Leon Belleth: Leon Belleth was a popular announcer with Radio Ceylon and subsequently the Sri Lanka Broadcasting Corporation. He presented a range of radio programs including Holiday Choice. Listeners enjoyed his free and easy style of broadcasting. Leon Belleth was educated at one of Sri Lanka's foremost educational institutions - Royal College Colombo. He was introduced to radio by the veteran broadcaster, Vernon Corea who mentored him while he was in Radio Ceylon.
Document 2: Elisabeth Sladen: Sladen played Sarah Jane in several audio plays. Two of them were produced for BBC Radio, The Paradise of Death (Radio 5, 1993), and The Ghosts of N-Space (Radio 2, 1996), together with Jon Pertwee and Nicholas Courtney. In 1997, Sladen won Hall Of Fame Actress in Cult TV Awards Big Finish Productions produced two series of Sarah Jane Smith audio adventures set in the present day, released in 2002 and 2006. Her husband, Brian Miller, appeared in the story Ghost Town. Her daughter Sadie appeared in the audios.
Document 3: The Bill: In its final year on air, "The Bill" was broadcast once a week, usually on Tuesdays or Thursdays, in a one-hour format. The programme focused on the lives and work of one shift of police officers, rather than on any particular aspect of police work. "The Bill" was the longest-running police procedural television series in the United Kingdom, and among the longest running of any British television series at the time of its cancellation. The title originates from "Old Bill", a slang term for the police.
Document 4: BBC Television: Mechanically scanned, 30-line television broadcasts by John Logie Baird began in 1929, using the BBC transmitter in London, and by 1930 a regular schedule of programmes was transmitted from the BBC antenna in Brookmans Park. Television production was switched from Baird's company to what is now known as BBC One on 2 August 1932, and continued until September 1935. Regularly scheduled electronically scanned television began from Alexandra Palace in London on 2 November 1936, to just a few hundred viewers in the immediate area. The first programme broadcast – and thus the first ever, on a dedicated TV channel – was "Opening of the BBC Television Service" at 15:00. The first major outside broadcast was the coronation of King George VI and Queen Elizabeth in May 1937. The service was reaching an estimated 25,000–40,000 homes before the outbreak of World War II which caused the service to be suspended in September 1939. The VHF broadcasts would have provided an ideal radio beacon for German bombers homing in on London, and the engineers and technicians of the service would be needed for the war effort, in particular the radar programme.
Document 5: Timeline of the BBC: 1930 9 March -- The majority of the BBC's existing radio stations are regrouped to form the BBC National Programme and the BBC Regional Programme. 14 July -- Transmission of the first experimental television play, The Man With the Flower in His Mouth. 30 September -- Number of radio licences reaches 12 million ``or roughly every second home in the country ''.
Document 6: BBC Television: Baird Television Ltd. made Britain's first television broadcast, on 30 September 1929 from its studio in Long Acre, London, via the BBC's London transmitter, using the electromechanical system pioneered by John Logie Baird. This system used a vertically-scanned image of 30 lines – just enough resolution for a close-up of one person, and with a bandwidth low enough to use existing radio transmitters. Simultaneous transmission of sound and picture was achieved on 30 March 1930, by using the BBC's new twin transmitter at Brookmans Park. By late 1930, 30 minutes of morning programmes were broadcast Monday to Friday, and 30 minutes at midnight on Tuesdays and Fridays, after BBC radio went off the air. Baird broadcasts via the BBC continued until June 1932.
Document 7: John Logie Baird: John Logie Baird FRSE (/ ˈloʊɡi bɛərd /; 14 August 1888 -- 14 June 1946) was a Scottish engineer, innovator, one of the inventors of the mechanical television, demonstrating the first working television system on 26 January 1926, and inventor of both the first publicly demonstrated colour television system, and the first purely electronic colour television picture tube.
Document 8: BBC Television: The two systems were to run on a trial basis for six months; early television sets supported both resolutions. However, the Baird system, which used a mechanical camera for filmed programming and Farnsworth image dissector cameras for live programming, proved too cumbersome and visually inferior, and ended with closedown (at 22:00) on Saturday 13 February 1937.
Document 9: BBC Television: After a series of test transmissions and special broadcasts that began in August 1936, the BBC Television Service officially launched on 2 November 1936 from a converted wing of Alexandra Palace in London. ``Ally Pally ''housed two studios, various scenery stores, make - up areas, dressing rooms, offices, and the transmitter itself, which then broadcast on the VHF band. BBC television initially used two systems on alternate weeks: the 240 - line Baird intermediate film system and the 405 - line Marconi - EMI system. The use of both formats made the BBC's service the world's first regular high - definition television service; it broadcast from Monday to Saturday between 15: 00 and 16: 00, and 21: 00 and 22: 00. The first programme broadcast -- and thus the first ever, on a dedicated TV channel -- was`` Opening of the BBC Television Service'' at 15: 00. The first major outside broadcast was the coronation of King George VI and Queen Elizabeth in May 1937.
Document 10: BBC Television: After a series of test transmissions and special broadcasts that began in August, regular BBC television broadcasts officially resumed on 1 October 1936, from a converted wing of Alexandra Palace in London, which housed two studios, various scenery stores, make-up areas, dressing rooms, offices, and the transmitter itself, now broadcasting on the VHF band. BBC television initially used two systems, on alternate weeks: the 240-line Baird intermediate film system and the 405-line Marconi-EMI system, each making the BBC the world's first regular high-definition television service, broadcasting Monday to Saturday from 15:00 to 16:00 and 21:00 to 22:00.
Document 11: Live at the BBC (Sandy Denny album): Live at the BBC is a four disc compilation of British folk singer songwriter Sandy Denny's BBC sessions from 1966 to 1973 and contains almost all her solo work for the corporation. Disc 4 of the set is a DVD of Denny performing three songs on the music programme "One in ten" in 1971: the only surviving solo footage of her. This compilation superseded the earlier one-disc set issued on the Strange Fruit label in 1997 that due to rights issues was withdrawn on the day of release thereby creating a highly collectable disc up until the release of this comprehensive set.
Document 12: Television in Australia: The first television broadcast in Australia took place on 30 September 1929 at the Menzies Hotel in Melbourne, using the electro - mechanical Radiovision system. Other transmissions took place in the city over the next few weeks. Also in 1929, the Baird system was used on 3DB, 3UZ and 2UE.
Document 13: Bill Greenslade: Bill Greenslade was a BBC Radio presenter. He appeared as a "castaway" on the BBC Radio programme "Desert Island Discs" on 12 Dec 1952.
Document 14: BBC Television: The BBC began its own regular television programming from the basement of Broadcasting House, London, on 22 August 1932. The studio moved to larger quarters in 16 Portland Place, London, in February 1934, and continued broadcasting the 30-line images, carried by telephone line to the medium wave transmitter at Brookmans Park, until 11 September 1935, by which time advances in all-electronic television systems made the electromechanical broadcasts obsolete.
Document 15: This Is Your Life (British TV series): Footballer Danny Blanchflower turned down the ``red book ''in February 1961. Author Richard Gordon (of Doctor in the House fame) was asked in 1974 and, like Bill Oddie (of The Goodies) in 2001, he initially turned it down, but changed his mind and appeared on the show. Actor Richard Beckinsale was a feature on the show shortly after his 31st birthday, eight months before his death.
ground_truth: June 1932
sub_queries: What is Bill Greenslade's place of employment? Answer: BBC
When did Baird cease showing its programs on BBC ? Answer: June 1932