Original sentence: However The Queen Mother later became the longest-lived member-by-marriage of the British Royal Family until her sister-in-law Princess Alice, Duchess of Gloucester broke the record, living even longer beyond her 100th birthday
Edited sentence: However Queen Elizabeth, The Queen Mother later became the longest-lived member-by-marriage of the British Royal Family until her sister-in-law Princess Alice, Duchess of Gloucester broke the record, living even longer beyond her 100th birthday