Complex sentence: Fred Hellerman (May 13,1927--September 1,2016) was an American folk singer, guitarist, producer, and songwriter, primarily known as one of the original members of The Weavers, together with Pete Seeger, Lee Hays, and Ronnie Gilbert.
Split into simpler sentences: Fred Hellerman (May 13,1927--September 1,2016) was an American folk singer, guitarist, producer, and songwriter. Hellerman was an original member of the seminal American folk group The Weavers, together with Pete Seeger, Lee Hays, and Ronnie Gilbert.