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In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.
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Question: When did the program on which song made its premier first air? Passage:A preview of the video was posted on AOL's PopEater.com, and subsequently on Bieber's VEVO channel, including behind the scenes clips of Bieber with the dancers, and highlights of the video with Usher and in front of a green screen. Bieber said, "It's really awesome to be able to work with professional dancers, you know, people that were in, like, ABDC, and also got an approval from choreographer Jamaica, who said Bieber was "killing it" and that she didn't have to give him any corrections. It made its premiere during the June 17, 2010 results show of the seventh season of So You Think You Can Dance, and was introduced by Usher after his performance of "OMG". It later premiered that night on VEVO and on June 18, 2010 on 20/20at the end of their show. The video features dance crews including, America's Best Dance Crew season 5 winners Poreotics, and Season 3's runner up Beat Freaks, as well as The Syrenz, LXD, Medea Sirkas, solo acts Simrin Player and Bboy Fly, and other dancers and crews. Singer/actress and model Katerina Graham makes a cameo in a scene with Poreotics. Bieber's best friend Ryan Butler, who appeared in the "One Time" video, also appears alongside Bieber, wearing a T-shirt advertising his Twitter account. According to Tamar Antai of MTV News the video "makes vague allusions" to clips for Busta Rhymes' "Pass the Courvoisier, Part II" and Chris Brown's "Wall to Wall". A backpack choreography scene with LXD recalls Usher's 1997 video for "You Make Me Wanna".

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It made its premiere during the June 17, 2010 results show of the seventh season of So You Think You Can Dance, and was introduced by Usher after his performance of "OMG"

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Question: How old was Cam Kirby's great grandfather when the American civil war ended? Passage:Born in Calgary. Kirby's great grandfather Charles Kirby (18051870) came to Canada as a soldier in a regiment from Yorkshire, England at the time of the Rebellion of 1837 in Upper Canada and settled in Whitby. His son Joseph Kirby (18441937) enlisted as mercenary in the 184th Regiment of New York State Infantry of the Union Army during the American Civil War and returned to Canada in 1865 and joined the Ashberminam Company of Volunteers during the Fenian Raids of 1866. In 1882 he applied for a homestead in the N.W.T. situated near what is now the town of Fleming (Sask.). Kirby's father William John Kirby (18661964) moved further west in 1885, initially as a lumberjack in Albert Canyon, worked as an agent for the Dominion Express in Vancouver, British Columbia, and later in Calgary where Cameron Kirby was born in 1909. In 1911 William Kirby set up as a merchant in Lochairn, later named at his instigation Rocky Mountain House after the Hudson's Bay Fort built nearby on the North Saskatchewan River in 1799. There he opened a dry goods store and became postmaster and eventually the town's Reeve. In 1917 when Cameron Kirby was eight years old his mother died and he was sent by his father to live with relatives. Kirby graduated from high school in Hanna, Alberta and then attended the University of British Columbia graduating with a Bachelor of Arts in 1930 before attending graduate school at the University of Alberta.

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Kirby's great grandfather Charles Kirby (18051870) came to Canada as a soldier in a regiment from Yorkshire, England at the time of the Rebellion of 1837 in Upper Canada and settled in Whitby

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Question: How many students were enrolled at Sussex University the year Mitchell became the first Professor of Music there? Passage:Mitchell was born in London, and educated at Brightlands Preparatory School and Dulwich College, London. In 1943 he registered as a conscientious objector and his war-time service was spent in the Non-Combatant Corps. After the war, he taught at Oakfield Preparatory School, London and in 1947 founded and edited the journal Music Survey; several issues appeared before he was joined in 1949 by Hans Keller and the journal was re-launched in the Music Survey's so-called 'New Series' (194952), whose uncompromising critical standards and pugnaciously pro-Britten and pro-Schoenberg stance brought it renown and notoriety in equal measure. Mitchell studied at Durham University 1949-50. In the 1950s he was a regular contributor to the journals Musical Times and Musical Opinion. In 1958 he became editor of Music Books at Faber and Faber and in the same year was appointed Editor of Boosey & Hawkes's music journal Tempo, until 1962. From 1963 to 1964 he was a special music adviser at Boosey & Hawkes with particular responsibility for contemporary music and the acquisition of contemporary composers. He was responsible for Peter Maxwell Davies and Nicholas Maw joining the publisher's list. In 1965, with the encouragement of Benjamin Britten he founded the music-publishing firm of Faber Music, and was its first Managing Director (vice-chairman, 1976, chairman, 1977, president, 198895). In 1972 he became the first Professor of Music at Sussex University (until 1976). Following the death of Benjamin Britten, Mitchell became a senior trustee of the Britten-Pears Foundation; in 1986 he became the Foundation's director and chairman of the Britten Estate Ltd. From 1989 to 1992 he was chairman of the Performing Right Society. He was appointed a CBE in the 2000 New Year Honours, and died on 28 September 2017.

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In 1972 he became the first Professor of Music at Sussex University (until 1976)