Complex sentence: Gregory Stuart "Greg" Lake (born 10 November 1947) is an English musician, songwriter and producer, best known as a vocalist and bassist of King Crimson, and the bassist, guitarist, vocalist, and lyricist of Emerson, Lake & Palmer.
Split into simpler sentences: Gregory Stuart "Greg" Lake (born 10 November 1947) is an English musician, songwriter, and producer. He was a singer and bassist for King Crimson, and the bassist, guitarist, singer, and lyricist for Emerson, Lake & Palmer.