Complex sentence: Lieutenant Colonel Sir Gerald Wellesley, 7th Duke of Wellington, was born on 21st August 1885, the fourth child and third son born to Arthur Charles Wellesley, 4th Duke of Wellington and Kathleen Bulkeley Williams.
Split into simpler sentences: Lieutenant Colonel Sir Gerald Wellesley, 7th Duke of Wellington, was born on 21st August 1885. His parents were Arthur Charles Wellesley, 4th Duke of Wellington and Kathleen Bulkeley Williams.