Question: What year was the Governor of Oklahoma first elected who approved the Oklahoma Housing Finance Agency's first trust indenture?

full_context: Document 1: David L. Boren: David Lyle Boren (born April 21, 1941) is an American university administrator and politician from the state of Oklahoma. A member of the Democratic Party, he served as the 21st governor of Oklahoma from 1975 to 1979 and in the United States Senate from 1979 to 1994. He is currently the 13th president of the University of Oklahoma. He was the longest serving chairman of the Senate Select Committee on Intelligence. David Boren officially announced his retirement as president of the University of Oklahoma, effective June 30, 2018.
Document 2: Nyhomes: Nyhomes is New York State's affordable housing lender. Its mission is to expand affordable housing opportunities for low- and moderate-income New Yorkers. “nyhomes” consists of three state agencies: the New York State Housing Finance Agency (HFA), the State of New York Mortgage Agency (SONYMA) and the New York State Affordable Housing Corporation (AHC).
Document 3: J. William Fulbright: James William Fulbright (April 9, 1905 – February 9, 1995) was a United States Senator representing Arkansas from January 1945 until his resignation in December 1974. Fulbright is the longest serving chairman in the history of the Senate Foreign Relations Committee. A Southern Democrat and a staunch multilateralist who supported the creation of the United Nations, he was also a segregationist who signed the Southern Manifesto. Fulbright opposed McCarthyism and the House Un-American Activities Committee and later became known for his opposition to American involvement in the Vietnam War. His efforts to establish an international exchange program eventually resulted in the creation of a fellowship program which bears his name, the Fulbright Program.
Document 4: Jim Inhofe: James Mountain Inhofe ( ; born November 17, 1934) is the senior United States senator from Oklahoma and a member of the Republican Party. First elected to the Senate in 1994, he was the ranking member of the United States Senate Committee on Environment and Public Works (EPW) and was its chairman from 2003 to 2007, and again from January 2015 until January 2017. Inhofe served eight years as the United States representative for 2=nd
Document 5: Dan Boren: Daniel David Boren (born August 2, 1973) is a retired American politician, who served as the U.S. Representative for Oklahoma 's 2 congressional district from 2005 to 2013. The district includes most of the eastern part of the state outside of Tulsa. He is a member of the Democratic Party.
Document 6: Federal Housing Finance Agency: The Federal Housing Finance Agency (FHFA) is an independent federal agency created as the successor regulatory agency of the Federal Housing Finance Board (FHFB), the Office of Federal Housing Enterprise Oversight (OFHEO), and the U.S. Department of Housing and Urban Development government-sponsored enterprise mission team, absorbing the powers and regulatory authority of both entities, with expanded legal and regulatory authority, including the ability to place government sponsored enterprises (GSEs) into receivership or conservatorship.
Document 7: Boyd House (University of Oklahoma): Boyd House, also known as the President's House and the OU White House, is the official residence of the president of the University of Oklahoma. The University's President, currently David L. Boren, lives in Boyd House as a primary residence free of charge. In 1976, it was listed on the National Register of Historic Places as "President's House, University of Oklahoma".
Document 8: Oklahoma Hall of Fame: The Oklahoma Memorial Association was founded in 1927 by Anna B. Korn with the purpose of establishing the Oklahoma Hall of Fame. Being inducted into the Oklahoma Hall of Fame is the highest honor one can receive from the state. In the 1970s, the Hefner Mansion was donated to the association to house the exhibits and busts or portraits of the inductees, and the organization changed its name to the Oklahoma Heritage Association in 1971. It then moved into the former Mid-Continent Life Insurance Building in Oklahoma City in 2007, opening the Gaylord-Pickens Museum and giving the Oklahoma Hall of Fame a public home.
Document 9: Oklahoma Shakespeare in the Park: Oklahoma Shakespeare in the Park (OSP) was founded in 1985 in Edmond, Oklahoma, USA by current Executive Director and Artistic Director Kathryn McGill (née Huey) and Jack J. O'Meara. With two different performing venues, the organization is dedicated to excellence in producing an eclectic range of classic plays to the entire Oklahoma City metro area and beyond. Oklahoma Shakespeare in the Park is a non-profit organization overseen by a Board of Directors. Jason Foreman serves as Board President. Jon Haque serves as Managing Director, Michelle Swink as PR/Marketing Associate, and Norman H. Hammon serves as Development Director. In 2007, it relocated to downtown Oklahoma City.
Document 10: Oregon Housing and Community Services Department: The Oregon Housing and Community Services Department (OHCS) is the housing finance agency of the government of the U.S. state of Oregon. It administers programs providing financing assistance for single family homes, new construction or rehabilitation of multi-family affordable housing developments, and grants and tax credits to promote affordable housing. Prior to 1991, when the Oregon Legislative Assembly merged the Housing Agency with State Community Services forming OHCS to eliminate duplicative costs and provide better coordination of related activities, financing and service programs were operated separately.
Document 11: Oklahoma gubernatorial election, 1978: The 1978 Oklahoma gubernatorial election was held on November 7, 1978, to elect the Governor of Oklahoma. Incumbent Republican Governor David L. Boren chose not to run for re-election to a second term in office. Instead Boren decided to run for the United States Senate. Former Governor, and sitting Lieutenant Governor George Nigh was elected, defeating Republican nominee Ron Shotts.
Document 12: Kelly D. Johnston: Kelly D. Johnston (born August 27, 1956) is a former Secretary of the United States Senate. He served as the 28th Secretary of the Senate and was nominated by Bob Dole, who was Senate Majority Leader at the time. He was the first Secretary of the Senate from Oklahoma and the second youngest ever chosen.
Document 13: University of Oklahoma: The University of Oklahoma (OU) is a coeducational public research university in Norman, Oklahoma. Founded in 1890, it had existed in Oklahoma Territory near Indian Territory for 17 years before the two became the state of Oklahoma. In Fall 2016 the university had 31,250 students enrolled, most at its main campus in Norman. Employing nearly 3,000 faculty members, the school offers 152 baccalaureate programs, 160 master's programs, 75 doctorate programs, and 20 majors at the first professional level. David Lyle Boren, a former U.S. Senator and Oklahoma Governor, has served as the university's president since 1994.
Document 14: Oklahoma Housing Finance Agency: The Oklahoma Housing Finance Agency (OHFA) is a non-profit organization which serves the people of Oklahoma by offering affordable housing resources, including loans and rent assistance. OHFA was created in 1975 when Governor of Oklahoma David L. Boren approved the agency's first trust indenture. OHFA is a public trust with the State of Oklahoma as the beneficiary. The Trust was established to better the housing stock and the housing conditions in the State of Oklahoma and administers the Section 8 housing program for the State.
Document 15: Vermont Housing Finance Agency: The Vermont Housing Finance Agency (VHFA) is chartered as a private non-profit agency to finance and promote affordable housing opportunities for low- and moderate- income Vermonters. They are located in Burlington, Vermont.
ground_truth: 1975