Question: who has topped the 28th annual world billionaires list of forbes released on 3rd march 2014
Answer: Bill Gates

title: The World's Billionaires 2014
text: The World's Billionaires 2014 The World's Billionaires 2014 edition was 28th annual ranking of The World's Billionaires by "Forbes" magazine. The list estimated the net worth of the world's richest people, excluding royalty and dictators, as of February 12, 2014. It was released online on March 3, 2014. Bill Gates, founder of Microsoft, added $9 billion to his fortune since 2013 and topped the 2014 billionaire list. He has topped the list 15 of the previous 20 years, but was last number one in 2009. Mexican tycoon Carlos Slim came in second place after being number one the previous four