Simplify the following text for a Grade 7 native English-speaking person.
Original: Sid Vicious ( born John Simon Ritchie 10 May 1957 - 2 February 1979 ) was an English musician best known as the bassist of the influential punk rock group Sex Pistols .
Simplified: Sid Vicious ( May 10 , 1957 â `` February 2 , 1979 ) was an English punk musician .