Question: Kensington Palace is the official London residence of the Duchess of Gloucester, who is the first cousin of whom?
Sentence (from "Kensington Palace"): It has been a residence of the British Royal Family since the 17th century, and is currently the official London residence of the Duke and Duchess of Cambridge, Prince Harry, the Duke and Duchess of Gloucester, the Duke and Duchess of Kent, and Prince and Princess Michael of Kent.
Relevant evidence: Yes