Question: On January 30, 2017, Elaine Duke was nominated by President Donald Trump to become the United States Deputy Secretary of Homeland Security under a man born in which year ?

Context paragraphs:
Homeland Security Advisor: The Assistant to the President for Homeland Security and Counterterrorism, commonly referred to as the Homeland Security Advisor and occasionally holding the title of Deputy National Security Advisor for Homeland Security and Counterterrorism, is a senior aide in the Executive Office of the President, based in the West Wing of the White House, who serves as the chief in-house advisor to the President of the United States on homeland security and counterterrorism issues.  The Homeland Security Advisor is a statutory member of the Homeland Security Council.  Serving at the pleasure of the President, the Homeland Security Advisor does not require Senate confirmation for appointment to the office.

Kirstjen Nielsen: Kirstjen M. Nielsen is a government official and national security expert who currently serves as Principal Deputy White House Chief of Staff to U.S. President Donald Trump since September 6, 2017.  She informally performed the role of Deputy Chief of Staff since the time John F. Kelly became White House Chief of Staff on July 31, 2017.  Nielsen had previously served as Kelly's Chief of Staff at the Department of Homeland Security.  She is the founder and former President of Sunesis Consulting.  Prior to serving in the Trump administration, she was a senior fellow and member of the Resilience Task Force of the Center for Cyber & Homeland Security think tank at the George Washington University and served on the Global Risks Report Advisory Board of the World Economic Forum.  She holds degrees from the Georgetown School of Foreign Service and the University of Virginia Law School.

James Loy: James Milton Loy (born August 10, 1942) is a former United States Coast Guard admiral who served as the acting U.S. Secretary of Homeland Security in 2005 and U.S. Deputy Secretary of Homeland Security (DHS) from December 4, 2003, to March 1, 2005.  Prior to his appointment as the DHS Deputy Secretary, he served as the second administrator of the Transportation Security Administration from 2002 to 2003, and before that as the Commandant of the U.S. Coast Guard from 1998 to 2002.

David L. Bernhardt: David L. Bernhardt is an American attorney and government administrator who currently serves as the United States Deputy Secretary of the Interior.  A partner and shareholder at the Colorado law firm Brownstein Hyatt Farber Schreck, he began working for the United States Department of the Interior in 2001, and served as the department's solicitor from 2006 to 2009, among other roles.  On April 28, 2017, President Donald Trump nominated him to be the United States Deputy Secretary of the Interior.  He was confirmed by the U.S. Senate on July 24, 2017.  He was then sworn into office on August 1, 2017.

John F. Kelly: John Francis Kelly (born May 11, 1950) is the current White House Chief of Staff for U.S. President Donald Trump, previously serving as U.S. Secretary of Homeland Security in the same administration.

Sloan D. Gibson: Sloan D. Gibson IV (born 1951/1952) is the former United States Deputy Secretary of Veterans Affairs.  Gibson was confirmed as the Deputy Secretary of Veterans Affairs by the United States Senate on February 11, 2014, replacing former Deputy Secretary W. Scott Gould who resigned on May 17, 2013.  He became the acting Secretary of Veterans Affairs after Secretary Eric Shinseki resigned on May 30, 2014.  Gibson held the acting secretary and deputy secretary positions concurrently until Robert McDonald was sworn in as the Secretary of Veterans Affairs on July 30, 2014.

John Marshall Mitnick: John Marshall Mitnick is an American attorney who serves as Senior Vice President, General Counsel, and Secretary of the Heritage Foundation.  He is President Donald Trump's nominee to become General Counsel of the United States Department of Homeland Security.  Mitnick previously served as Vice President, General Counsel, and Secretary at Raytheon.  During the presidency of George W. Bush, he served as Deputy Counsel of the Homeland Security Council and then as Associate Counsel to the President.

Tom Bossert: Thomas P. "Tom" Bossert (born March 25, 1975) is an American lawyer and Republican White House staffer, currently serving President Donald Trump as Homeland Security Advisor.  Immediately before, he was fellow at the Atlantic Council and prior to that he served as Deputy Homeland Security Advisor to President George W. Bush.  In that capacity, he co-authored the 2007 National Strategy for Homeland Security.  Prior to that, Bossert held positions in the Federal Emergency Management Agency, the Small Business Administration, the Office of the Independent Counsel, and the House of Representatives.  He also was appointed as the Director of Infrastructure Protection under Bush, overseeing the security of critical U.S. infrastructure, a post he held for two years.  Following that, he was appointed the Senior Director for Preparedness Policy within the Executive Office of the President.

Elaine Duke: Elaine Costanzo Duke (born 1958) is an American civil servant who is the current Acting United States Secretary of Homeland Security.  On January 30, 2017, she was nominated by President Donald Trump to become the United States Deputy Secretary of Homeland Security under John F. Kelly.  She became acting Secretary of Homeland Security on July 31, 2017, when John F. Kelly assumed the office of White House Chief of Staff.

Thomas G. Bowman: Thomas G. Bowman is an American political aide who has served as the United States Deputy Secretary of Veterans Affairs since 2017.  On June 21, 2017, President Donald Trump nominated him to be the United States Deputy Secretary of Veterans Affairs.  This nomination was confirmed by the U.S. Senate on August 3, 2017.

Supporting paragraphs: Elaine Duke John F. Kelly
Answer: 1950