PERSON@1 -LRB- born NUMBER@1 April NUMBER@2 -RRB- is a MISC@1 artist , musician , and record producer known for his long association with The Beatles , for whom he designed the cover of their album Revolver .

PERSON@1 -LRB- born April NUMBER@1 , NUMBER@3 -RRB- is a MISC@2 artist and musician , who was a friend of The Beatles .
