Complex sentence: The interviews began on 23 March 1977 and lasted 12 days and were taped for two hours a day, Mondays, Wednesdays and Fridays for a total of twenty-eight hours and forty-five minutes.
Split into simpler sentences: The interviews began on 23 March 1977 and lasted 12 days. They were taped for two hours a day, on Mondays, Wednesdays and Fridays, for a total of twenty-eight hours and forty-five minutes.