Complex sentence: Chaney is also said to have had a belligerent relationship with actor Martin Kosleck; years after the fact, Kosleck explained this as a case of jealousy over Kosleck's (self-described) superior talent.
Split into simpler sentences: Chaney is also said to have had a belligerent relationship with actor Martin Kosleck. Years after the fact, Kosleck explained this as a case of jealousy over Kosleck's (self-described) superior talent.