Question: When did Bud Roper's father die?

Knowledge 1: Bud Roper
Burns Worthington "Bud" Roper (1925-2003) was an American pollster.He was chairman (1967–93) of Roper ASW, which was founded as Elmo Roper, Inc. by his father Elmo Roper.He was chairman (1970–94) of the Roper Center for Public Opinion Research at the University of Connecticut.He helped develop industry standards for methodology and the wording of poll questions.Two polling controversies occurred during his career; in both cases he showed readiness to admit mistakes. [SEP] Knowledge 2: Elmo Roper
Elmo Burns Roper Jr. (July 31, 1900 in Hebron, Nebraska – April 30, 1971 in Redding, Connecticut) was a pollster known for his pioneering work in market research and opinion polling.In 1933, he cofounded Cherington, Wood, and Roper, a marketing research firm.When that partnership fell apart, he founded his own research company, Elmo Roper,Inc. He was hired by Henry Luce in 1935 to run surveys for "Fortune", continuing these surveys for 15 years.His prediction of Franklin Delano Roosevelt's electoral victory over Alf Landon in 1936 was correct to within 0.9%; his 1940 prediction of Roosevelt's victory was correct to within 0.5%, further solidifying the reputation of Roper's techniques.In 1940, Roosevelt hired Roper to assess public opinion of Lend-Lease prior to its implementation.In 1942 he was hired by William Joseph Donovan to be the deputy director of the Office of Strategic Services; Roper subsequently worked with the Office of War Information.After leaving the OWI he founded the Roper Center for Public Opinion Research at the University of Connecticut in 1947.Roper Opinion Research Company (the "Roper Poll") was later renamed Roper Starch Worldwide Company and eventually acquired by NOP World and then GfK in 2005.
Knowledge 1: Bud Roper
Burns Worthington "Bud" Roper (1925-2003) was an American pollster.He was chairman (1967–93) of Roper ASW, which was founded as Elmo Roper, Inc. by his father Elmo Roper.He was chairman (1970–94) of the Roper Center for Public Opinion Research at the University of Connecticut.He helped develop industry standards for methodology and the wording of poll questions.Two polling controversies occurred during his career; in both cases he showed readiness to admit mistakes. [SEP] Knowledge 2: David Vaughan (Wisconsin politician)
David Vaughan (February 3, 1822 – February 28, 1890) was an American farmer, mechanic, and politician.Born in North Wales, Vaughan emigrated with his parents to the United States in 1831 and settled in Remsen, New York.Vaughan went to public school in Remsen, New York.In 1864, he moved to the town of Burns, La Crosse County, Wisconsin.He was a farmer and mechanic.Vaughan served as justice of the peace for the town of Burns.Vaughan served in the Wisconsin State Assembly in 1887 and was a Republican.Vaughan died at his home in the town of Burns, Wisconsin.
Knowledge 1: Elmo Roper
Elmo Burns Roper Jr. (July 31, 1900 in Hebron, Nebraska – April 30, 1971 in Redding, Connecticut) was a pollster known for his pioneering work in market research and opinion polling.In 1933, he cofounded Cherington, Wood, and Roper, a marketing research firm.When that partnership fell apart, he founded his own research company, Elmo Roper,Inc. He was hired by Henry Luce in 1935 to run surveys for "Fortune", continuing these surveys for 15 years.His prediction of Franklin Delano Roosevelt's electoral victory over Alf Landon in 1936 was correct to within 0.9%; his 1940 prediction of Roosevelt's victory was correct to within 0.5%, further solidifying the reputation of Roper's techniques.In 1940, Roosevelt hired Roper to assess public opinion of Lend-Lease prior to its implementation.In 1942 he was hired by William Joseph Donovan to be the deputy director of the Office of Strategic Services; Roper subsequently worked with the Office of War Information.After leaving the OWI he founded the Roper Center for Public Opinion Research at the University of Connecticut in 1947.Roper Opinion Research Company (the "Roper Poll") was later renamed Roper Starch Worldwide Company and eventually acquired by NOP World and then GfK in 2005. [SEP] Knowledge 2: David Vaughan (Wisconsin politician)
David Vaughan (February 3, 1822 – February 28, 1890) was an American farmer, mechanic, and politician.Born in North Wales, Vaughan emigrated with his parents to the United States in 1831 and settled in Remsen, New York.Vaughan went to public school in Remsen, New York.In 1864, he moved to the town of Burns, La Crosse County, Wisconsin.He was a farmer and mechanic.Vaughan served as justice of the peace for the town of Burns.Vaughan served in the Wisconsin State Assembly in 1887 and was a Republican.Vaughan died at his home in the town of Burns, Wisconsin.

Answer: April 30, 1971