Complex sentence: However, Elizabeth Montgomery's marriage to "Bewitched" director William Asher was in trouble and the couple had separated by the end of the eighth season, causing severe friction in their professional relationship and ending any possibility of another season.
Split into simpler sentences: However, Elizabeth Montgomery's marriage to "Bewitched" director William Asher was in trouble and the couple had separated by the end of the eighth season. This caused severe friction in their professional relationship and ended any possibility of another season.