question: When is Alfred V. Du Pont's father's birthday?
context: [["Francis Ir\u00e9n\u00e9e du Pont", ["Francis Ir\u00e9n\u00e9e du Pont( December 3, 1873 \u2013 March 16, 1942) was an American chemist, and manager at the E.I. du Pont de Nemours Company.", "He was the great grandson of its founder, Eleuth\u00e8re Ir\u00e9n\u00e9e du Pont."]], ["Lammot du Pont II", ["Lammot du Pont II( October 12, 1880 \u2013 July 24, 1952) was an American businessman who was the head of the du Pont family's E. I. du Pont de Nemours and Company for 22 years."]], ["Francis Victor DuPont", ["Francis V. du Pont was a member of the famous Du Pont family of DuPont Chemical, based in Wilmington, Delaware, and an official connected with the development of public roads and highways in the United States.", "The son of United States Senator T. Coleman du Pont, who was the president of DuPont Chemical, Francis Victor du Pont was a member of the Delaware State Highway Commission from 1922 to 1949.", "He also served as chairman of the commission.", "In this role, Du Pont played a major role in the development of the financing, engineering, and initial construction of the Delaware Memorial Bridge, the fifth longest suspension span in the world, which was opened to traffic on July 1, 1951.", "In 1953, he was appointed Commissioner of the US Bureau of Public Roads.", "While serving as Commissioner, he recommended a highway program that led to legislation under which the Interstate Highway System was constructed.", "He resigned his Federal post on January 1, 1956.", "On May 16, 1962 Francis DuPont died from Lung Cancer."]], ["Francis Gurney du Pont", ["Francis Gurney du Pont (May 27, 1850 \u2013 November 7, 1904) was the creator of smokeless gunpowder.", "Du Pont served as superintendent of the Upper and Lower Hagley Yards and later as general manager of Carney's Point, New Jersey, in 1891.", "His invention was assisted by cousin Pierre S. du Pont.", "His son was E. Paul du Pont, founder of Du Pont Motors."]], ["Charles I. du Pont", ["Charles Ir\u00e9n\u00e9e du Pont( March 29, 1797 \u2013 January 31, 1869) was an American manufacturer and politician, and an early member of the prominent du Pont family business.", "He was a nephew of Eleuth\u00e8re Ir\u00e9n\u00e9e du Pont, the founder of the E. I. du Pont de Nemours and Company, and a member of the Delaware General Assembly."]], ["\u00c9leuth\u00e8re Ir\u00e9n\u00e9e du Pont", ["\u00c9leuth\u00e8re Ir\u00e9n\u00e9e du Pont de Nemours (24 June 1771 \u2013 31 October 1834), known as Ir\u00e9n\u00e9e du Pont, or E. I. du Pont, was a French-American chemist and industrialist who founded the gunpowder manufacturer E. I. du Pont de Nemours and Company.", "His descendants, the du Pont family, have been one of America's richest and most prominent families since the 19th century, with generations of influential businessmen, politicians and philanthropists."]], ["Victor Marie du Pont", ["Victor Marie du Pont de Nemours (October 1, 1767 \u2013 January 30, 1827) was a French American diplomat, politician and businessman.", "He was a member of the Delaware General Assembly, the founder of the Du Pont, Bauduy & Co., wool manufacturers, and brother of \u00c9leuth\u00e8re Ir\u00e9n\u00e9e du Pont, the founder of the E.I. du Pont de Nemours Company."]], ["Louise E. du Pont Crowninshield", ["Louise Evelina du Pont Crowninshield( August 3, 1877 \u2013 July 11, 1958) was an American heiress and historic preservationist, who was the great granddaughter of Eleuth\u00e8re Ir\u00e9n\u00e9e du Pont, the founder of E. I. du Pont de Nemours and Company."]], ["Alfred V. du Pont", ["Alfred Victor Philadelphe du Pont de Nemours (April 11, 1798 \u2013 October 4, 1856) was French American chemist and industrialist, who was the eldest son and successor of \u00c9leuth\u00e8re Ir\u00e9n\u00e9e du Pont, the founder of the E.I. du Pont de Nemours and Company."]], ["William du Pont", ["William du Pont( August 21, 1855 \u2013 January 20, 1928) was a member of the Delaware Du Pont family.", "He was the youngest son of General Henry du Pont( 1812-1889) and Louisa Gerhard du Pont( 1816-1900).", "He married twice, first in 1878 to his cousin May Lammot du Pont( 1854- 1927), the daughter of Victor du Pont( 1828- 1888) and Alice Hounsfield du Pont( 1833- 1904); William and May divorced in 1892.", "In June of that year, he married Annie Rogers Zinn, the daughter of the locomotive maker Theodore Rogers( d. November 18, 1871) and Mary Andrews Rogers( d. March 11, 1918); Annie was the divorced wife of George Zinn.", "William and Annie had two children, William du Pont, Jr. and Marion duPont Scott."]]]
supporting_facts: [["Alfred V. du Pont", 0], ["\u00c9leuth\u00e8re Ir\u00e9n\u00e9e du Pont", 0]]
evidences: [["Alfred Victor Philadelphe du Pont", "father", "\u00c9leuth\u00e8re Ir\u00e9n\u00e9e du Pont"], ["\u00c9leuth\u00e8re Ir\u00e9n\u00e9e du Pont", "date of birth", "24 June 1771"]]
answer: 24 June 1771