You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: FAMOUS TEENAGERS 
Clue: This young man who turned 18 on June 21, 2000 has a dog named Widgeon & a younger brother named Harry
prince william

Category: WRITERS 
Clue: A memorial window near his grave at Winchester Cathedral was a gift from the fishermen of England & America
izaak walton

Category: PRESIDENTIAL SUCCESSION 
Clue: It's the name of the person next in the line of presidential succession after Robert Byrd

condoleezza rice