PERSON@1 -LRB- born December NUMBER@1 , NUMBER@2 in LOCATION@1 , LOCATION@2 -RRB- , known as PERSON@2 -LRB- sometimes spelled PERSON@3 -RRB- , is a rock and blues singer , keyboardist , guitarist and songwriter , best known as a founding member of The ORGANIZATION@1 .

PERSON@2 -LRB- born December NUMBER@1 , NUMBER@2 -RRB- is a rock musician .
