Question: The French hairstylist Alain Pichon was well known as the hairdresser to a famous worldwide celebrity. In what year did this celebrity retire from his profession after a 20-year career?
Sentence (from "David Beckham"): David Robert Joseph Beckham, {'1': ", '2': ", '3': ", '4': "} ( ; born 2 May 1975) is an English former professional footballer.
Relevant evidence: No