Complex sentence: She was born The Honourable Cynthia Jane Spencer; her title changed to The Lady Cynthia Jane Spencer in 1975, when her grandfather died and her father became the 8th Earl Spencer.
Split into simpler sentences: She was born The Honourable Cynthia Jane Spencer. Her title changed to The Lady Cynthia Jane Spencer in 1975, when her grandfather died and her father became the 8th Earl Spencer.