Question: Which Allen & Company Sun Valley Conference previous guest was born on August 15, 1964 ?

<P0-S0> The Allen & Company Sun Valley Conference is an annual media finance conference hosted and wholly independently funded by private investment firm Allen & Company. <P0-S1>  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. <P0-S2>  The conference has taken place in Sun Valley, Idaho for one week each July since 1983. <P0-S3>  The conference typically features business leaders, political figures, and major figures in the philanthropic and cultural spheres. <SEP> <P1-S0> An eight-member IHSAA-Sanctioned Athletic Conference within the Northeastern Indiana counties of Adams, Allen, DeKalb, Huntington, Noble, Wells, and Whitley. <P1-S1>  The conference was started in 1989 as the Northeast Hoosier Conference when six schools from the Northeastern Indiana Athletic Conference (Bellmont, Columbia City, DeKalb, East Noble, Homestead, and New Haven) joined with two schools from the Allen County Athletic Conference (Fort Wayne Carroll and Norwell). <P1-S2>  The smaller six schools decided to pull out of the conference in 2015 the conference will cease to exist, forcing Carroll and Homestead out, who then joined the Summit Athletic Conference. <P1-S3>  The remaining schools, while settling on the current league name, added Huntington North of the North Central Conference and Leo of the Allen County Athletic Conference, who are more similar in size to the rest of the schools. <P1-S4>  While the six NEHC schools technically dropped out, they never actually left the league, having succeeded in forcing out the two large Fort Wayne schools, ended up staying in the league. <P1-S5>  This is not an unheard of tactic, as most notably Ohio's Chagrin Valley Conference pulled virtually the same move around the same time. <SEP> <P2-S0> Melinda Ann Gates (née French; born August 15, 1964), DBE is an American philanthropist, former Microsoft employee, and wife of Microsoft founder Bill Gates. <SEP> <P3-S0> The third season of the American television medical drama Grey's Anatomy, commenced airing on the American Broadcasting Company (ABC) on September 21, 2006, and concluded on May 17, 2007. <P3-S1>  The season was produced by Touchstone Television, in association with Shondaland Production Company and The Mark Gordon Company, the showrunner being Shonda Rhimes. <P3-S2>  Actors Ellen Pompeo, Sandra Oh, Katherine Heigl, Justin Chambers, and T.R. Knight reprised their roles as surgical interns Meredith Grey, Cristina Yang, Izzie Stevens, Alex Karev, and George O'Malley, respectively, continuing their expansive storylines as focal points throughout the season. <P3-S3>  Previous main cast members Chandra Wilson, James Pickens, Jr., Kate Walsh, Isaiah Washington, and Patrick Dempsey also returned, while previous guest stars Sara Ramirez and Eric Dane were promoted to series regulars, following the extension of their contracts.