Question: What year was the Governor of Oklahoma first elected who approved the Oklahoma Housing Finance Agency's first trust indenture?
Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] 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. [END] 
Answer: 
1975
1975