Complex sentence: Kleindienst resigned in the midst of the Watergate scandal nearly a year later, on April 30,1973, the same day that John Dean was fired and H. R. Haldeman and John Ehrlichman quit.
Split into simpler sentences: Kleindienst resigned in the midst of the Watergate scandal nearly a year later, on April 30,1973. This was the same day that John Dean was fired and H. R. Haldeman and John Ehrlichman quit.