The World's Billionaires

Columns: No | Name | Net worth ( USD ) | Age | Nationality | Source ( s ) of wealth
1 | Bill Gates | $ 52.0 billion | 50 | United States | Microsoft | 2 | Warren Buffett | $ 42.0 billion | 75 | United States | Berkshire Hathaway | 3 | Carlos Slim | $ 30.0 billion | 66 | Mexico | América Móvil , Grupo Carso | 4 | Ingvar Kamprad | $ 28.0 billion | 79 | Sweden | IKEA | 5 | Lakshmi Mittal | $ 23.5 billion | 55 | India | Mittal Steel Company | 6 | Paul Allen | $ 22.0 billion | 53 | United States | Microsoft | 7 | Bernard Arnault | $ 21.5 billion | 57 | France | LVMH Moët Hennessy • Louis Vuitton | 8 | Al-Waleed bin Talal | $ 20.0 billion | 49 | Saudi Arabia | Kingdom Holding Company | 9 | Kenneth Thomson | $ 19.6 billion | 82 | Canada | The Thomson Corporation | 10 | Li Ka-shing | $ 18.8 billion | 77 | Hong Kong | Cheung Kong Group , Hutchison Whampoa

Example questions:
For the youngest billionaire on the 2006 ranking of The World 's Billionaires , what did Time magazine call him ? | For the oldest billionaire on the 2006 ranking of The World 's Billionaires , when did he die ?

Answers:
the Arabian Warren Buffett | June 12 , 2006