In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Q: Keith Richards ( born 18 December 1943 ) is an English musician , singer , and songwriter , best known as the co-founder , guitarist , secondary vocalist , and co-principal songwriter of the Rolling Stones .
A:
Keith Richards ( born 18 December 1943 ) is an English guitarist best known as a founder member of the Rolling Stones .