List of best-selling singles

Columns: Artist | Single | Released | Sales ( in millions )
Bee Gees | Massachusetts | 1967 | 5 | Culture Club | Karma Chameleon | 1983 | 5 | Enigma | Sadeness ( Part I ) | 1990 | 5 | Engelbert Humperdinck | Release Me | 1967 | 5 | Terry Jacks | Seasons in the Sun | 1974 | 5 | The Jackson 5 | I 'll Be There | 1970 | 5 | Tommy James and the Shondells | Crimson and Clover | 1968 | 5

Example questions:
Which best selling single was released by a Welsh artist with knighthood ? | Which best selling single was released by an artist born on 29 April 1907 ? | What were the sales in millions of the best selling single written by Bob Crewe and Kenny Nolan ? | What were the sales in millions of the best selling single by a German musical project founded in 1990 ?

Answers:
Delilah | Petit Papa Noël | 5.5 | 5