paragraph_text: The D-Generation was a popular and influential Australian TV sketch comedy show, produced and broadcast by the Australian Broadcasting Corporation (ABC) for two series, between 1986 and 1987. A further four specials were broadcast on the Seven Network between 1988 and 1989.

paragraph_text: The Broadcasting Act (long title: "An Act respecting broadcasting and to amend certain Acts in relation thereto and in relation to radiocommunication") is an Act of the Parliament of Canada regarding broadcasting of radiocommunications.

paragraph_text: "Corporal Punishment", or "Plan B: Corporal Punishment", is the second episode of "Blackadder Goes Forth", the fourth series of the BBC sitcom "Blackadder". It was first broadcast on BBC One on 5 October 1989. Blackadder faces a court-martial for shooting a carrier pigeon.

paragraph_text: Created by Gene Deitch under the Terrytoons studio (which by that time was a subsidiary of CBS, the network that broadcast "Captain Kangaroo"), "Tom Terrific" ran in a series of five-minute cartoons created specifically for the "Captain Kangaroo" show from 1957-1959, and was rerun on "Kangaroo" for years thereafter. For several years after 1962, "Tom Terrific" would be broadcast every other week, alternating with "Lariat Sam", another Terrytoons creation.

paragraph_text: Dastardly and Muttley in Their Flying Machines (or simply Dastardly and Muttley in the UK) is a cartoon produced by Hanna-Barbera Productions for CBS. Originally the series was broadcast as a Saturday morning cartoon, airing from September 13, 1969 to January 3, 1970. The show focuses on the efforts of Dick Dastardly and his canine sidekick Muttley to catch Yankee Doodle Pigeon, a carrier pigeon who carries secret messages (hence the name of the show's theme song "Stop the Pigeon"). The title is a reference to the film and song "Those Magnificent Men in Their Flying Machines".

paragraph_text: CHAM is a Canadian radio station in Hamilton, Ontario, Canada. Owned by Bell Media, the station broadcasts Premiere Radio Networks' "24/7 Comedy" radio network under the brand "Funny 820". CHAM's studios are located on Upper Wentworth Street near Lime Ridge Mall in Hamilton, while its 6-tower array is located near Binbrook.

paragraph_text: 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.

paragraph_text: Pigeon Boy is a children's cartoon created by Millimages of France, and is shown on a number of television networks, including the Australian Broadcasting Corporation in Australia. It is set in the fictional city of Ultrapolis and centres on the lives of three teenagers:Pigeon Boy, and his two companions, one who is extremely fat and the other who is the complete opposite.

paragraph_text: CHLM-FM is a Canadian radio station, broadcasting at 90.7 FM in Rouyn-Noranda, Quebec. The station broadcasts the programming of the Ici Radio-Canada Première network.

paragraph_text: After a series of hearings beginning in September 1949, the FCC found the RCA and CTI systems fraught with technical problems, inaccurate color reproduction, and expensive equipment, and so formally approved the CBS system as the U.S. color broadcasting standard on October 11, 1950. An unsuccessful lawsuit by RCA delayed the first commercial network broadcast in color until June 25, 1951, when a musical variety special titled simply Premiere was shown over a network of five East Coast CBS affiliates. Viewing was again restricted: the program could not be seen on black - and - white sets, and Variety estimated that only thirty prototype color receivers were available in the New York area. Regular color broadcasts began that same week with the daytime series The World Is Yours and Modern Homemakers.

paragraph_text: Pigeon Street is an animated children's television series, written by Michael Cole, originally shown on the BBC in 1981 as part of its 'See-Saw' strand for preschoolers. There were two series with eight and five episodes respectively, each programme lasting 15 minutes. The series has been repeated a number of times.

paragraph_text: 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.

paragraph_text: Evangelische Omroep (EO, English: "Evangelical Broadcasting") is one of the twelve member-based broadcasting associations contributing to the Netherlands Public Broadcasting system. It has as its mission to bring people into contact with Jesus Christ and its statement of faith is a form of Evangelicalism. EO is one of the few broadcasting associations in the "pillarized" Dutch broadcasting system to have remained totally faithful to its religious roots. For a long time every one of its programmes made reference to God and to the Christian religion, although this is less often the case in the 21st century.

paragraph_text: The PBA on KBS was a presentation of Philippine Basketball Association games on Kanlaon Broadcasting System (now the Radio Philippines Network), and was the first broadcaster of the PBA on television.

paragraph_text: Who's Whose is a panel quiz television game show that ran on the Columbia Broadcasting System (CBS) television network. It premiered as a TV series on June 25, 1951, and is noted for being one of the first television series to be dropped after one episode.

paragraph_text: Issues and Answers was a once-weekly TV news program that was telecast by the American Broadcasting Company network from November 1960 to November 1981. The series was distributed to the ABC affiliate stations on Sunday afternoons for either live broadcast or video taped for later broadcast.

paragraph_text: What's the Story is an American television panel show broadcast on the DuMont Television Network from July 25, 1951, to September 23, 1955, and aired in eleven different timeslots.

paragraph_text: Melodifestivalen 2001 was the selection for the 41st song to represent Sweden at the Eurovision Song Contest. It was the 42nd time that this system of picking a song had been used. 1,567 songs were submitted to SVT for the competition. The final was broadcast on SVT1 and Sveriges Radio's P4 network.

paragraph_text: After the BBC rejected Sesame Street, the Independent Television Authority (ITA) considered giving it a network slot on ITV, after concluding that further research was needed. In March and April 1971, HTV broadcast a three - week weekday test run; the series was received favourably, but the ITA concluded the more testing would be required. They passed the enquiry to The Authority Schools Committee, who authorised LWT, Grampian Television and HTV to broadcast another test run of Sesame Street, under the understanding that its permission ``should not be construed as educational endorsement of Sesame Street for British children ''. HTV's second trial ran in December 1971 for a three - week daily run, and LWT and Grampian broadcast it for thirteen weeks on Saturday mornings from September to December 1971.

paragraph_text: KBS N Co., Ltd. () is a South Korean company owned by the Korean Broadcasting System, producing media, broadcast and telecommunication products for non free-to-air networks used under permission registered due to KBS in 1996, including Skylife and Cable TV(KCTA) service providers.

Question: How long did the network that broadcast Pigeon street alternate different broadcasting systems?
Answer: six months