Question: Previous guests of the Allen & Company Sun Valley Conference have included an American internet entrepreneur who was the co-founder and executive chairman of what business-oriented social network?
Context: Jay Adelson (born Jay Steven Adelson, September 7, 1970) is an American Internet entrepreneur.  In 2014 Jay co-founded Center Electric with Andy Smith.  In 2013 he founded Opsmatic, a technology company that improves productivity on operations teams.  In 2015 Opsmatic was bought by New Relic.  Adelson's Internet career includes Netcom, DEC's Palo Alto Internet Exchange, co-founder of Equinix, Revision3 and Digg, and CEO of SimpleGeo, Inc.  In 2008, Adelson was named a member of Time Magazine's Top 100 Most Influential People in the World and was listed as a finalist on the same list in 2009. 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. Lev Binzumovich Leviev (born June 22, 1984, Volgograd) is a Russian-Israeli Internet entrepreneur and investor, co-founder of Russia's largest social network VK.com (originally "VKontakte"), "Vaizra Capital" investment fund, and "Selectel" network data centres. Alexis Kerry Ohanian, (born April 24, 1983) is an American Internet entrepreneur and investor, who is co-founder and executive chairman of the social news website Reddit.  He also co-founded the early stage venture capital firm Initialized Capital, helped launch the travel search website Hipmunk, and started the social enterprise Breadpig.  Ohanian is based in San Francisco, and was a partner at Y Combinator. Justin Waldron (June 18, 1988) is an American internet entrepreneur best known as the co-founder of Zynga, which makes online social and mobile games.  Zynga is considered to be the pioneer of the social and mobile gaming industries, responsible for creating many of the microtransaction and viral marketing business models which are now ubiquitous.  Within four years of its founding, Zynga grew to $1 billion in annual revenue, faster than any other internet company.  In 2011 Zynga held the largest IPO since Google, with a valuation of over $10 billion.  Waldron left Zynga in October 2013 and is currently an active angel investor and advisor in various other technology companies. BuzzFeed is an American internet media company based in New York City.  The firm is a social news and entertainment company with a focus on digital media and feminism.  BuzzFeed was founded in 2006 as a viral lab focusing on tracking viral content, by Jonah Peretti and John S. Johnson III.  Kenneth Lerer, co-founder and chairman of "The Huffington Post", started as a co-founder and investor in BuzzFeed and is now the executive chairman as well. Chuck Davis (born 1960) is an Internet entrepreneur.  Since May 2014, Davis has served as the Chairman and Chief Executive Officer of Prodege, LLC, an Internet and media company based in El Segundo, California that operates multiple customer engagement brands.  Its flagship consumer business, Swagbucks, is a reward website which grants users gift cards or cash in exchange for their use of the service.  Davis previously served as Prodege’s Executive Chairman from January 2013–April 2014. Reid Garrett Hoffman (born August 5, 1967) is an American internet entrepreneur, venture capitalist and author.  Hoffman was the co-founder and executive chairman of LinkedIn, a business-oriented social network used primarily for professional networking.  He is currently a partner at the venture capital firm Greylock Partners.  On the "Forbes" 2017 list of the world's billionaires, Hoffman was ranked #631 with a net worth of US$3.1 billion. Naveen Selvadurai (born January 27, 1982, Chennai, Tamil Nadu, India) is an American internet entrepreneur and co-founder of location-based social networking site Foursquare.com.  He is currently working at startup studio Expa which was founded by co-founder of Uber and StumbleUpon - Garret Camp , as a partner.  He was featured in Inc Magazine's 30 under 30 list in the year 2010.  He was also featured in Rediff. com's article - 4 NRIs among US's coolest young entrepreneurs. Monis Rahman is a Pakistani internet entrepreneur, venture capitalist and businessman.  Rahman is the co-founder and executive chairman of Naseeb Networks, Inc. a business-oriented social network used primarily for online job recruiting.  Rahman has been listed among the top entrepreneurs of 21st century several times. " Forbes" named him at #6 on its list of top "Ten Big Hitting Asian Businessmen under 50".
Answer: LinkedIn