Complex sentence: Ethel MacDonald was diagnosed with multiple sclerosis in February 1958 and lost her ability to speak, less than three years later, died in Glasgow's Knightswood Hospital at the age of 51.
Split into simpler sentences: Ethel MacDonald was diagnosed with multiple sclerosis in February 1958 and lost her ability to speak. Within three years she died in Glasgow's Knightswood Hospital at the age of 51.