Question: How many people founded the artist whose UK chart topping song was featured on the band 's third studio album , Parallel Lines ( 1978 ) ?

text: List of UK Singles Chart number ones of the 1970s
Million-selling and platinum records
In April 1973 , the British Phonographic Industry began classifying singles and albums by the number of units sold . The highest threshold is `` platinum record '' and was then awarded to singles that sold over 1,000,000 units . [ 5 ] [ nb 1 ] Thirteen records were classified platinum in the 1970s and two number-one songs from the 1970s were classified as platinum in the subsequent decade . [ 25 ] Slade 's `` Merry Xmas Everybody '' subsequently sold over one-million copies but in 1985 , after sales from its re-release were included . [ 26 ] [ 27 ] Two other songs originally released in the 1970s became platinum and become million selling records but both were number-ones in a subsequent decade after being re-released : `` Imagine '' by John Lennon charted at number six in 1975 but reached number one in 1981 following Lennon 's death at the end of the previous year and Tony Christie 's `` ( Is This The Way To ) Amarillo '' reached number eighteen in 1971 but later took top spot after being re-released as a charity single in 2005 . Five number-ones – ABBA 's `` Dancing Queen '' , Ian Dury and The Blockheads ' `` Hit Me with Your Rhythm Stick '' , The New Seekers ' `` I 'd Like to Teach the World to Sing ( In Perfect Harmony ) '' , Julie Covington 's `` Do n't Cry for Me Argentina '' and Pink Floyd 's `` Another Brick in the Wall ( Part II ) '' – passed the million-sales mark following the introduction of music downloads in 2004 . [ 28 ] [ 29 ] [ 30 ] [ 31 ] [ 32 ] [ 33 ]
The UK Singles Chart is the official record chart in the United Kingdom. In the 1970s, it was compiled weekly by the British Market Research Bureau (BMRB) on behalf of the British record industry with a one-week break each Christmas. Prior to 1969 many music papers compiled their own sales charts but, on 15 February 1969, the BMRB was commissioned in a joint venture by the BBC and Record Retailer to compile the chart. BMRB compiled the first chart from postal returns of sales logs from 250 record shops. The sampling cost approximately £52,000 and shops were randomly chosen and submitted figures for sales taken up to the close of trade on Saturday. The data was compiled on Monday and given to the BBC on Tuesday to be announced on Johnnie Walker's afternoon show and later published in Record Retailer (rebranded Music Week in 1972). However, the BMRB often struggled to have the full sample of sales figures returned by post. The 1971 postal strike meant that data had to be collected by telephone but this was deemed inadequate for a national chart, and by 1973 the BMRB was using motorcycle couriers to collect sales figures. In terms of number-one singles, ABBA were the most successful group of the decade having seven singles reach the top spot. The longest duration of a single at number-one was nine weeks and this was achieved on three occasions: Bohemian Rhapsody by Queen in 1975; Mull of Kintyre / Girls' School by Wings in 1977 and You're the One That I Want by John Travolta and Olivia Newton-John in 1978. Thirteen records were released that sold over one-million copies within the decade and Mull of Kintyre also became the first ever single to sell over two-million copies. In doing so it became the best-ever selling single beating the benchmark set by The Beatles' song She Loves You in 1963.
Artist Song Date released Date certified platinum Year of millionth sale
Gary Glitter I Love You Love Me Love 9 November 1973 1 January 1974 1973
Brotherhood of Man Save Your Kisses for Me 5 March 1976 1 May 1976 1976
Queen Bohemian Rhapsody 31 October 1975 1 January 1976 1975
Wings Mull of Kintyre 11 November 1977 1 December 1977 1977
David Soul Do n't Give Up on Us 3 December 1976 1 February 1977 1977
Boney M Rivers of Babylon / Brown Girl in the Ring 14 April 1978 1 May 1978 1978
Boney M Mary 's Boy Child - Oh My Lord 24 November 1978 1 December 1978 1978
Simon Park Eye Level 3 November 1972 1 January 1978 1977
John Travolta and Olivia Newton-John You 're the One That I Want 1 May 1978 1 July 1978 1978
John Travolta and Olivia Newton-John Summer Nights 1 September 1978 1 October 1978 1978
Village People Y.M.C.A 1 November 1978 1 January 1979 1979
Blondie Heart of Glass 19 January 1979 1 February 1979 1979
Art Garfunkel Bright Eyes 9 January 1979 1 May 1979 1979
Pink Floyd Another Brick in the Wall ( Part II ) 23 November 1979 1 January 1980 2004-10
Slade Merry Xmas Everybody 7 December 1973 1 December 1980 1985
The New Seekers I 'd Like to Teach the World to Sing ( In Perfect Harmony ) 11 December 1971 - 2004-10
ABBA Dancing Queen 6 August 1976 - 2004-10
Julie Covington Do n't Cry for Me Argentina 12 November 1976 - 2004-10
Ian Dury and The Blockheads Hit Me with Your Rhythm Stick 1 November 1978 - 2004-10