Detailed Instructions: Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
Q: princess margaret, countess of snowdon ci gcvo gcstj (margaret rose; 21 august 1930 9 february 2002), was the only sibling of queen elizabeth ii and the younger daughter of king george vi and queen elizabeth.
A:
princess margaret, countess of snowdon