You will be given a definition of a task first, then some input of the task.
In this task, you are given a set of context paragraph and some supporting facts to answer a question. Your task is to generate answer for given question based on set of context paragraphs and supporting facts.

Context_1 : Gary L. Stewart, born February 26, 1953 in Stockton, California, was the Imperator of AMORC from 1987 to 1990. After internal allegations of embezzlement, Stewart was ousted as leader by the organization's board of directors. On August 10, 1993, the AMORC asked the Superior Court of Santa Clara County in California for the withdrawal of charges against him and paid for the existing legal fees. In 1996, Stewart founded another organization devoted to Rosicrucianism called Confraternity of the Rose + Cross of which he is the current Imperator. Context_2 : David S. Adams was the Assistant Secretary of State for Legislative Affairs of the United States Department of State. He was appointed to this position in August 2011. Previously he was Deputy Assistant Secretary of State for House Affairs. Before this he served for 24 years on the staff of Gary L. Ackerman a member of the United States House. Context_3 : Gary L. Wilson was the chairman of the board of Northwest Airlines, chief financial officer of Walt Disney Company, and chief financial officer of Marriott Corporation. Context_4 : Gary L. Crittenden (born 1953) is an American financial manager. He is the former CEO of HGGC and the former chairman of Citi Holdings. He has served on the boards of Staples Inc., Ryerson, Inc., TJX Companies, and Utah Capital Investment Corp. From 2000 to 2007, Crittenden was Executive Vice President and Chief Financial Officer (CFO) of American Express, and from March 2007 to March 2009, he was the Chief Financial Officer of Citigroup. Context_5 : Northwest Airlines Corp. (often abbreviated as NWA) was a major United States airline founded in 1926 and absorbed into Delta Air Lines, Inc. by a merger. Approved on October 29, 2008, the merger made Delta the largest airline in the world until the American Airlines-US Airways merger on December 9, 2013. Northwest continued to operate under its own name and brand until the integration of the carriers was completed on January 31, 2010. Context_6 : Thomas Woodrow Wilson (December 28, 1856 February 3, 1924) was an American politician and academic who served as the 28th President of the United States from 1913 to 1921. A member of the Democratic Party, Wilson served as the President of Princeton University from 1902 to 1910 and then ran and was elected as a progressive Democrat to the office of Governor of New Jersey. Wilson's victory in the 1912 presidential election made him the first Southerner elected to the presidency since Zachary Taylor in 1848. He also led the United States during World War I, establishing an activist foreign policy known as "Wilsonianism." He was a major leader at the Paris [Versailles] Peace Conference in 1919, where he championed the proposed League of Nations. However, he was unable to obtain Senate approval for U.S. membership. After he suffered debilitating strokes in September 1919, his wife and staff members handled most of his presidential duties. Context_7 : Billy Wilson (born October 4, 1958) is the president of Oral Roberts University in Tulsa, Oklahoma. Prior to his election as president of Oral Roberts University, Wilson served as the vice chairman for the ORU Board of Trustees. He has also served as the executive director for the International Center for Spiritual Renewal in Cleveland, Tennessee and the chair and executive director of the Empowered 21 Initiative. In addition, Wilson has served on various boards and committees, including the Mission America Coalition (Lausanne USA) Facilitation Committee, the Pentecostal World Fellowship Advisory Board, and the International Christian Embassy Jerusalem. Context_8 : Chicago and Southern Air Lines (C&S) was a United States airline that started life as Pacific Seaboard Air Lines in California and was organized on June 15, 1933. Following the move from California, the airline's headquarters were initially located in St. Louis, Missouri and were then moved to Memphis, Tennessee which also served as a hub for the carrier. C&S was merged into Delta Air Lines in 1953 thus providing Delta with its first international routes. Context_9 : Midway Airlines was a United States airline founded on August 6, 1976, by investor Kenneth t. Carlson and joined by Irving T. Tague and William B. Owens in an October 13, 1976, filing with the Civil Aeronautics Board (CA) for an airline operating certificate. Although it received its operating certificate from the CAB prior to the passage of the Airline Deregulation Act in 1978, it is widely recognized as the first post-deregulation start-up. The airline commenced operations on October 31, 1979. Context_10 : Siddharth N. "Bobby" Mehta was former CEO and vice chairman of HSBC North America. Mehta served as an Advisor of TransUnion since December 31, 2012. Mehta serves as consultant of TransUnion. He served the chief executive officer and president of TransUnion from August 2007 to December 31, 2012, and Transunion Financing Corp. until December 31, 2012. From May 2007 to July 2007, he served as a consultant to the board of directors at TransUnion. He served as the chief executive officer and president of TransUnion until December 31, 2012. He served as the chief executive officer of TransUnion LLC. He served as chairman of the board and chief executive officer of HSBC Finance Corporation from April 2005 to February 2007. He served as chief executive officer and president of TransUnion LLC from 2007 to 2012. From 1998 to 2007, he held a variety of positions with HSBC Finance Corporation and HSBC North America Holdings, Inc. Mehta served as chief executive officer of HSBC North America until February 2007. Mehta served as consultant of TransUnion since May 2007 until July 2007. Mehta served as group managing director of HSBC Holdings PLC of HSBC Finance Corp. since April 30, 2005, and its unit chief executive officer since March 2005. He served as the chief executive of HS BC North America Holdings Inc., of HSBC Finance Corp., from March 2005 to February 15, 2007. He served as an executive chairman of HSBC Financial Corporation Limited since April 2005 and served as its chief executive officer from April 2005 to February 15, 2007. He served as the chief executive officer of HSBC Bank USA, N.A. until February 2007. He served as the chief executive officer of HSBC North America Holdings Inc. since March 2005. He served as chairman and chief executive officer of HSBC Financial Corp., Ltd. He oversaw HSBC's global credit card services, its North American consumer lending and mortgage services businesses and its first mortgage operation. He was also responsible for corporate marketing, strategic planning and corporate development for HSBC North America Holdings Inc. and had responsibility for the strategic management of credit cards throughout the HSBC Group. Mehta served as group executive of Credit Card Services, Auto Finance and Canada of Household International Inc., since July 2002. He worked at MasterCard's U.S. region board since March 2000. Mehta joined Household International Inc., in 1998. He served as senior vice president of The Boston Consulting Group in Los Angeles and co-leader of Boston Consulting Group Financial Services Practice in the United States. Mehta served as a director of Global Board of MasterCard Incorporated since March 17, 2005. He served as unit chairman of HSBC Holdings PLC and served as its board member since March 2005. He served as vice chairman and director of HSBC Financial Corporation Limited., (Formerly Household International Inc.). He has been a director of Avant Credit Corporation since December 18, 2014. He has been an independent director of The Allstate Corporation since February 19, 2014. He serves as a member of the advisory board at Core2 Group, Inc. He has been non-executive independent director at Piramal Enterprises Ltd since April 1, 2013. He serves on the boards of Datacard, Chicago Public Education Fund, University of Chicago Laboratory Schools, The Economic Club of Chicago, The Field Museum and Myelin Repair Foundation. He serves as a director of TransUnion Corp. and TransUnion LLC. He served as a director of MasterCard International Inc. (also known as MasterCard Worldwide) (formerly, MasterCard Inc.), since March 17, 2005. He served as a director of HSBC Financial Corp. Ltd. He has been a director of TransUnion since April 2012. Mehta serves on the board of international advisors for the Monterey, California, Institute of International Studies and is a member of the Financial Services Roundtable. He also serves on the board of advisors for the Myelin Repair Foundation. Mehta holds a Bachelor of Arts in economics from the London School of Economics and Masters of Business Administration from the University of Chicago. He stepped down as head of the North American unit after the lender raised its forecast for bad loans in the U.S. He is of Indian descent. fact_1 : Gary L. Wilson was the chairman of the board of Northwest Airlines, chief financial officer of Walt Disney Company, and chief financial officer of Marriott Corporation. fact_2 : Northwest Airlines Corp. (often abbreviated as NWA) was a major United States airline founded in 1926 and absorbed into Delta Air Lines, Inc. by a merger. Question: Gary L. Wilson served this United States airline as chairman of the board that was founded in 1926 and absorbed into which lines?
Output:
Delta Air Lines