Which Allen & Company Sun Valley Conference previous guest was born on August 15, 1964 ?
Allen &amp; Company Sun Valley Conference:  Previous conference guests have included Bill and Melinda Gates, Warren and Susan Buffett, Tony Blair, Google founders Larry Page and Sergey Brin, Allen alumnus and former Philippine Senator Mar Roxas, Google Chairman Eric Schmidt, Yahoo! co-founder Jerry Yang, Facebook founder Mark Zuckerberg, Media Mogul Rupert Murdoch, eBay CEO Meg Whitman, BET founder Robert Johnson, Time Warner Chairman Richard Parsons, NBA player LeBron James, Governor Chris Christie, entertainer Dan Chan, Katharine Graham of "The Washington Post", Diane Sawyer, InterActiveCorp Chairman Barry Diller, Linkedin co-founder Reid Hoffman, Sandro Salsano from Salsano Group, and Washington Post CEO Donald E. Graham, and Oprah.
i don't know