<Table> Key <Tr> <Td> The yellow background indicates the #1 song on Billboard's 1968 Year - End Chart of Pop Singles . </Td> </Tr> </Table> <Tr> <Td> The yellow background indicates the #1 song on Billboard's 1968 Year - End Chart of Pop Singles . </Td> </Tr> <Table> <Tr> <Th> Issue Date </Th> <Th> Song </Th> <Th> Artist (s) </Th> <Th> Reference </Th> </Tr> <Tr> <Td> January 6 </Td> <Td> "Hello, Goodbye" </Td> <Td> The Beatles </Td> <Td> </Td> </Tr> <Tr> <Td> January 13 </Td> <Td> </Td> </Tr> <Tr> <Td> January 20 </Td> <Td> "Judy in Disguise (With Glasses)" </Td> <Td> John Fred and His Playboy Band </Td> <Td> </Td> </Tr> <Tr> <Td> January 27 </Td> <Td> </Td> </Tr> <Tr> <Td> February 3 </Td> <Td> "Green Tambourine" </Td> <Td> The Lemon Pipers </Td> <Td> </Td> </Tr> <Tr> <Td> February 10 </Td> <Td> "Love is Blue" </Td> <Td> Paul Mauriat </Td> <Td> </Td> </Tr> <Tr> <Td> February 17 </Td> <Td> </Td> </Tr> <Tr> <Td> February 24 </Td> <Td> </Td> </Tr> <Tr> <Td> March 2 </Td> <Td> </Td> </Tr> <Tr> <Td> March 9 </Td> <Td> </Td> </Tr> <Tr> <Td> March 16 </Td> <Td> "(Sittin' On) The Dock of the Bay" </Td> <Td> Otis Redding </Td> <Td> </Td> </Tr> <Tr> <Td> March 23 </Td> <Td> </Td> </Tr> <Tr> <Td> March 30 </Td> <Td> </Td> </Tr> <Tr> <Td> April 6 </Td> <Td> </Td> </Tr> <Tr> <Td> April 13 </Td> <Td> "Honey" </Td> <Td> Bobby Goldsboro </Td> <Td> </Td> </Tr> <Tr> <Td> April 20 </Td> <Td> </Td> </Tr> <Tr> <Td> April 27 </Td> <Td> </Td> </Tr> <Tr> <Td> May 4 </Td> <Td> </Td> </Tr> <Tr> <Td> May 11 </Td> <Td> </Td> </Tr> <Tr> <Td> May 18 </Td> <Td> "Tighten Up" </Td> <Td> Archie Bell & the Drells </Td> <Td> </Td> </Tr> <Tr> <Td> May 25 </Td> <Td> </Td> </Tr> <Tr> <Td> June 1 </Td> <Td> "Mrs. Robinson" </Td> <Td> Simon & Garfunkel </Td> <Td> </Td> </Tr> <Tr> <Td> June 8 </Td> <Td> </Td> </Tr> <Tr> <Td> June 15 </Td> <Td> </Td> </Tr> <Tr> <Td> June 22 </Td> <Td> "This Guy's in Love with You" </Td> <Td> Herb Alpert </Td> <Td> </Td> </Tr> <Tr> <Td> June 29 </Td> <Td> </Td> </Tr> <Tr> <Td> July 6 </Td> <Td> </Td> </Tr> <Tr> <Td> July 13 </Td> <Td> </Td> </Tr> <Tr> <Td> July 20 </Td> <Td> "Grazing in the Grass" </Td> <Td> Hugh Masekela </Td> <Td> </Td> </Tr> <Tr> <Td> July 27 </Td> <Td> </Td> </Tr> <Tr> <Td> August 3 </Td> <Td> "Hello, I Love You" </Td> <Td> The Doors </Td> <Td> </Td> </Tr> <Tr> <Td> August 10 </Td> <Td> </Td> </Tr> <Tr> <Td> August 17 </Td> <Td> "People Got to Be Free" </Td> <Td> The Rascals </Td> <Td> </Td> </Tr> <Tr> <Td> August 24 </Td> <Td> </Td> </Tr> <Tr> <Td> August 31 </Td> <Td> </Td> </Tr> <Tr> <Td> September 7 </Td> <Td> </Td> </Tr> <Tr> <Td> September 14 </Td> <Td> </Td> </Tr> <Tr> <Td> September 21 </Td> <Td> "Harper Valley PTA" </Td> <Td> Jeannie C. Riley </Td> <Td> </Td> </Tr> <Tr> <Td> September 28 </Td> <Td> "Hey Jude" </Td> <Td> The Beatles </Td> <Td> </Td> </Tr> <Tr> <Td> October 5 </Td> <Td> </Td> </Tr> <Tr> <Td> October 12 </Td> <Td> </Td> </Tr> <Tr> <Td> October 19 </Td> <Td> </Td> </Tr> <Tr> <Td> October 26 </Td> <Td> </Td> </Tr> <Tr> <Td> November 2 </Td> <Td> </Td> </Tr> <Tr> <Td> November 9 </Td> <Td> </Td> </Tr> <Tr> <Td> November 16 </Td> <Td> </Td> </Tr> <Tr> <Td> November 23 </Td> <Td> </Td> </Tr> <Tr> <Td> November 30 </Td> <Td> "Love Child" </Td> <Td> Diana Ross & the Supremes </Td> <Td> </Td> </Tr> <Tr> <Td> December 7 </Td> <Td> </Td> </Tr> <Tr> <Td> December 14 </Td> <Td> "I Heard It Through the Grapevine" </Td> <Td> Marvin Gaye </Td> <Td> </Td> </Tr> <Tr> <Td> December 21 </Td> <Td> </Td> </Tr> <Tr> <Td> December 28 </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Issue Date </Th> <Th> Song </Th> <Th> Artist (s) </Th> <Th> Reference </Th> </Tr>

What was the number one song in july 1968
find me the text answering this question