Question: What is the birthdate of this American television executive and media consultant, who was a media consultant and for whom Gabriel Sherman wrote a biography?

full_context: Document 1: Daniel Schulman (writer): Daniel Schulman is an American author and journalist. He is a senior editor at the Washington, D.C. bureau of "Mother Jones". In 2014, he wrote the book "Sons of Wichita", a biography of the Koch family. In 2015, Schulman, along with David Corn, released a story in "Mother Jones" questioning whether Bill O'Reilly's story about his coverage of the Falklands War was accurate.
Document 2: Casey Sherman: Casey Sherman (born January 19, 1969) is an American author, journalist and screenwriter most famous for his 2009 novel "The Finest Hours".
Document 3: Roger Ailes: Roger Eugene Ailes (May 15, 1940 – May 18, 2017) was an American television executive and media consultant. He was the founder and one-time Chairman and CEO of Fox News and the Fox Television Stations Group, from which he resigned in July 2016 following allegations that he sexually harassed female colleagues. Ailes was a media consultant for Republican presidents Richard Nixon, Ronald Reagan, and George H. W. Bush, and for Rudy Giuliani's first mayoral campaign. In 2016, after he left Fox News, he became an adviser to the Donald Trump campaign, where he assisted with debate preparation.
Document 4: Roger Simon (journalist): Roger Simon is a writer and commentator, the chief political columnist of "Politico" and a New York Times best-selling author. He has won more than three dozen frst-place awards for journalism, and is the only person to win twice the American Society of Newspaper Editors Distinguished Writing Award for commentary. His book on the 1996 presidential race, "Show Time", became a New York Times best-seller.
Document 5: Rudy Giuliani: Rudolph William Louis Giuliani {'1': ", '2': ", '3': ", '4': "} ( ; born May 28, 1944) is an American lawyer, businessman, public speaker, former mayor of New York City, and an informal adviser on cybersecurity to the White House.
Document 6: Roger Stone: Roger Jason Stone Jr. (born August 27, 1952) is an American political consultant, lobbyist, and strategist, noted for his use of opposition research usually for candidates of the Republican Party.
Document 7: Steve Bannon: Stephen Kevin "Steve" Bannon (born November 27, 1953) is an American media executive, political thinker, and former investment banker, who is executive chairman of Breitbart News. He served as the White House Chief Strategist (a newly created position) in the administration of US President Donald Trump during the first seven months of his term. In this capacity, he attended the Principals Committee of the U.S. National Security Council from January 28, 2017 to April 5, 2017.
Document 8: Gabriel Sherman: Gabriel Sherman is an American author. In 2014, he wrote a biography about Fox News Channel president Roger Ailes called "The Loudest Voice in the Room: How the Brilliant, Bombastic Roger Ailes Built Fox News – and Divided a Country", which debuted at #9 on The New York Times Bestseller list.
Document 9: Greater Talent Network (GTN): Greater Talent Network Speakers Bureau (GTN) is an American speakers bureau based in New York. GTN is known for its roster of prominent clients, including authors Michael Lewis, P.J. O'Rourke and Jeffrey Toobin; actors Laura Linney and Danny Glover; musicians Paula Abdul and Kenny "Babyface" Edmonds; Navy SEALs Marcus Luttrell and Kevin Lacz; athletes Alex Rodriguez and Eli Manning; sports executives Billy Beane and Bob Myers; national security experts Raymond Kelly, Valerie Plame Wilson, and General Wesley Clark; and finance/technology disruptors Dan Schulman, and Danielle Weisberg and Carly Zakin, founders of theSkimm.
Document 10: Eric Bolling: Eric Thomas Bolling (born March 2, 1963) is an American television personality, conservative political commentator, author, and financial commentator. He has occupied numerous roles as a commentator on financial issues for television, most notably for Fox News. Bolling took over as host of the Fox Business Channel news program "Cashin' In" in 2013. He was a co-host of Fox News Channel's "The Five" at its inception, until leaving to co-host "Fox News Specialists" in May 2017. In 2016, Bolling published his first book, "Wake Up America", which became a "New York Times" best seller. In 2017 he wrote another book, "The Swamp: Washington's Murky Pool of Corruption and Cronyism and How Trump Can Drain It". On August 5, 2017, "HuffPost" reported that he had sent unsolicited lewd photographs and text messages to three female colleagues several years previously. Fox News conducted an independent investigation and mutually agreed to part ways with Bolling the following month.
Document 11: Russell Schriefer: Russell J. Schriefer is an American political strategist and media consultant who has worked on six out of the last seven presidential campaigns. In 2012, he was a senior advisor and media consultant on Governor Mitt Romney’s presidential campaign.
Document 12: Corey Lewandowski: Corey R. Lewandowski ( ; born September 18, 1973) is an American political operative and political commentator. He was a political commentator for One America News Network (OANN) and Fox News Channel (FNC) and a former political commentator for the Cable News Network (CNN), as well as a former campaign manager of Donald Trump's 2016 campaign for President of the United States from January 2015 to June 2016.
Document 13: Mary Matalin: Mary Joe Matalin (born August 19, 1953) is an American political consultant well known for her work with the Republican Party. She has served under President Ronald Reagan, was campaign director for George H. W. Bush, was an assistant to President George W. Bush, and counselor to Vice President Dick Cheney until 2003. Matalin has been chief editor of Threshold Editions, a conservative publishing imprint at Simon & Schuster, since March 2005. She is married to Democratic political consultant James Carville. She appears in the award-winning documentary film "" and also played herself, opposite her husband, James Carville, John Slattery, and Mary McCormack in the short lived HBO series "K Street".
Document 14: Bill O'Reilly (political commentator): William James O'Reilly Jr. (born September 10, 1949) is an American journalist, author, and television host. During the late 1970s and 1980s, he reported for local television stations in the United States and later for CBS News and ABC News. He anchored the tabloid television program "Inside Edition" from 1989 to 1995. In 1996, O'Reilly joined the Fox News Channel and hosted "The O'Reilly Factor" until 2017. "The O'Reilly Factor" was the highest-rated cable news show for 16 years and he was described by media analyst Howard Kurtz as "the biggest star in the 20 year history at Fox News" at the time of his departure. He is the author of several books and hosted "The Radio Factor" (2002–2009). After a "New York Times" investigation revealed that O'Reilly and Fox News had settled five sexual harassment lawsuits totaling $13 million, Fox News terminated O'Reilly's employment. In 2017, he started the "No Spin News" podcast.
Document 15: Devil's Bargain: Devil's Bargain: Steve Bannon, Donald Trump, and the Storming of the Presidency is a book by "Bloomberg Businessweek" journalist Joshua Green about the partnership between Donald Trump and Steve Bannon that led to their 2016 political upset and the rise of the alt-right. Prior to writing the book, Green had worked as a journalist for "The Atlantic" and "Bloomberg", where he garnered experience reporting on conservatives. He had previously written a profile on Bannon in 2015, and interviewed Bannon for the book.
ground_truth: May 15, 1940