Question: Which Allen & Company Sun Valley Conference previous guest was born on August 15, 1964 ?
Context: Fred VanVleet (born February 25, 1994) is an American professional basketball player for the Toronto Raptors of the National Basketball Association (NBA).  At Auburn High School in Rockford, Illinois, he was an All-State player who was mostly recruited by mid-major basketball programs.  In college, he has contributed to a resurgence of Wichita State Shockers basketball that included a final four run in the 2013 NCAA Men's Division I Basketball Tournament by the 2012–13 Shocker team as a freshman and an undefeated regular season by the 2013–14 team as a sophomore.  By his sophomore year, he was on midseason watchlists for most major awards.  He was named as a 2014 NCAA Men's Basketball All-American by a variety of media outlets.  As a junior for the 2014–15 Shockers, he was an All-Missouri Valley Conference first team selection and received All-American honorable mention recognition from the Associated Press.  He is Wichita State's career leader in both assists and steals, and was named Missouri Valley Conference Men's Basketball Player of the Year as both a sophomore and a senior. Melinda Ann Gates (née French; born August 15, 1964), DBE is an American philanthropist, former Microsoft employee, and wife of Microsoft founder Bill Gates. Ketchum is a city in Blaine County, Idaho, United States, in the central part of the state.  The population was 2,689 at the 2010 census, down from 3,003 in 2000.  Located in the Wood River Valley, Ketchum is adjacent to Sun Valley and the communities share many resources; both sit in the same valley beneath Bald Mountain, with its world-famous skiing.  The city also draws tourists from around the world to enjoy its fishing, hiking, trail riding, tennis, shopping, art galleries, and more.  The airport for Ketchum, Friedman Memorial Airport, is approximately 15 mi south in Hailey. The 2010–11 Missouri State Bears basketball team represented Missouri State University during the 2010–11 NCAA Division I men's basketball season.  The Bears, led by third year head coach Cuonzo Martin, played their home games at JQH Arena and are members of the Missouri Valley Conference.  They finished the season 26–9, 15–3 in Missouri Valley play to win the regular season conference championship.  They lost in the championship game of the 2011 Missouri Valley Conference Men's Basketball Tournament.  As a regular season conference champion who failed to win their conference tournament, they received an automatic bid in the 2011 National Invitation Tournament where they defeated Murray State in the first round before falling in the second round to Miami (FL). 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.  The season was produced by Touchstone Television, in association with Shondaland Production Company and The Mark Gordon Company, the showrunner being Shonda Rhimes.  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.  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. An eight-member IHSAA-Sanctioned Athletic Conference within the Northeastern Indiana counties of Adams, Allen, DeKalb, Huntington, Noble, Wells, and Whitley.  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).  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.  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.  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.  This is not an unheard of tactic, as most notably Ohio's Chagrin Valley Conference pulled virtually the same move around the same time. Sun Valley is a resort city in Blaine County in central Idaho, in the western United States.  The resort is adjacent to the city of Ketchum and within the greater Wood River valley.  The population was 1,406 at the 2010 census, down from 1,427 in 2000.  The elevation of Sun Valley (at the Lodge) is 5920 ft above sea level.  The area is served by Friedman Memorial Airport in Hailey, approximately 15 mi south.  Visitors to Sun Valley are relatively close to the Sawtooth National Recreation Area, accessed over Galena Summit on Highway 75, the "Sawtooth Scenic Byway." The Lakes Valley Conference is an athletic conference for high schools in Michigan.  It will be formed in the 2017-2018 school year following the departure of several schools from the Kensington Lakes Activities Association.  The name was created from a hybrid of its schools previous affiliations including the Kensington Lakes Activities Association, the Kensington Valley Conference, and the Western Lakes Activities Association 100 Miles of Hate is the name given to an American college football rivalry between the Middle Tennessee Blue Raiders football team of Middle Tennessee State University and Western Kentucky Hilltoppers football team of Western Kentucky University.  The universities, which first played each other in 1914, are separated by about 100 miles (161 km) of Interstate 65 and Interstate 24.  For much of their football histories, they have been conference rivals in leagues such as the Ohio Valley Conference and Sun Belt Conference.  The rivalry was on hiatus from 1991 to 2007, resuming after Western Kentucky transitioned to Football Bowl Subdivision play and became a football member of the Sun Belt Conference in 2009 (Western Kentucky had been a non-football member of that conference since 1982).  After Middle Tennessee left the Sun Belt for Conference USA (C-USA) in 2013, the rivalry again went on hiatus.  However, the rivalry was renewed in 2014 when Western Kentucky joined C-USA.  The match up usually generates a substantial amount of excitement within the respective fan bases, and tensions are usually high in every meeting. The Allen & Company Sun Valley Conference is an annual media finance conference hosted and wholly independently funded by private investment firm Allen & Company.  The conference has taken place in Sun Valley, Idaho for one week each July since 1983.  The conference typically features business leaders, political figures, and major figures in the philanthropic and cultural spheres.  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.
Answer: Melinda Gates