Complex sentence: Brigadier Alysande Stuart and her brother professor Alistaire Stuart were the founders of the Weird Happenings Organisation (W.H.O.), a group created to replace the Resources Control Executive (R.C.X.) as Britain's primary organisation for the investigation of supernatural and superhuman incidents.
Split into simpler sentences: Brigadier Alysande Stuart and her brother professor Alistaire Stuart were the founders of the Weird Happenings Organisation (W.H.O.). A group created to replace the Resources Control Executive (R.C.X.) as Britain's primary organisation for the investigation of supernatural and superhuman incidents.