Complex sentence: Crystal Voyager was a 1973 feature film directed by David Elfick and written and narrated by surfer, photographer and filmmaker George Greenough, who had previously made the 1970 surfing film "The Innermost Limits Of Pure Fun".
Split into simpler sentences: Crystal Voyager was a 1973 feature film directed by David Elfick. It was filmed, written and narrated by surfer, photographer and filmmaker George Greenough who had previously made the 1970 surfing film "The Innermost Limits Of Pure Fun".