Complex sentence: Originally screened as a one-off BBC Drama Playhouse production transmitted on the 7 December 1970, it was announced in September 2010 that the recording-previously lost-was discovered in the American Library of Congress.
Split into simpler sentences: Originally screened as a one-off BBC Drama Playhouse production transmitted on the 7th December 1970. It was announced in September 2010 that the recording-previously lost-was discovered in the American Library of Congress.