Question: Who were the directors of the 1997 documentary film which starred the actress best known for her long-running TV variety show, "The Carol Burnett Show"?
Sentence (from "A Special Evening with Carol Burnett"): It is the 278th overall episode of the show and the 24th episode of the eleventh and final season which aired on Wednesday, March 29, 1978 from 8:00 to 10:00 p.m. EST on CBS.
Relevant evidence: No