Complex sentence: Mary Josephine Brydon, OBE, FRCN, is a British nurse who helped found the Norfolk Allergy Diagnostic and Advisory Service (NADAAS) and undertook a research project which demonstrated that there was a demand by both doctors and the public for this sort of service.
Split into simpler sentences: Mary Josephine Brydon, OBE, FRCN, is a British nurse. She helped found the Norfolk Allergy Diagnostic and Advisory Service (NADAAS) and undertook a research project which demonstrated that there was a demand by both doctors and the public for this sort of service.