Question: What is the date of death of Angelica Singleton Van Buren's husband?

Knowledge 1: Angelica Singleton Van Buren
Sarah Angelica Van Buren ("née" Singleton; February 13, 1818 – December 29, 1877), was the daughter-in-law of the eighth United States President Martin Van Buren.She was married to the President's son, Abraham Van Buren.She assumed the post of First Lady because the president's wife, Hannah Van Buren, had died 17 years earlier and he remained unwed throughout the rest of his life.Although she was never married to a president, she is the youngest woman ever to act as the White House hostess. [SEP] Knowledge 2: Martin Van Buren
Martin Van Buren (born Maarten Van Buren; December 5, 1782 – July 24, 1862) was an American statesman who served as the eighth president of the United States from 1837 to 1841.He was the first president born speaking a language other than English (Dutch) and the first born after the United States had declared its independence from Great Britain.A founder of the Democratic Party, he had previously served as the ninth governor of New York, the tenth United States secretary of state, and the eighth vice president of the United States.He won the 1836 presidential election with the endorsement of popular outgoing President Andrew Jackson and the organizational strength of the Democratic Party.He lost his 1840 reelection bid to Whig Party nominee William Henry Harrison, thanks in part to the poor economic conditions surrounding the Panic of 1837.Later in his life, Van Buren emerged as an elder statesman and an important anti-slavery leader (abolitionist) who led the Free Soil Party ticket in the 1848 presidential election.Van Buren was born in Kinderhook, New York, to a family of patroon Dutch Americans; his father was a Patriot during the American Revolution.He was raised speaking Dutch and learned English at school, making him the first and still only U.S. president to speak English as his second language.He trained as a lawyer and quickly became involved in politics as a member of the Democratic-Republican Party.He won election to the New York State Senate and became the leader of the Bucktails, the faction of Democratic-Republicans opposed to New York Governor DeWitt Clinton.Van Buren established a political machine known as the Albany Regency and in the 1820s emerged as the most influential politician in the Empire State.He was elected to the United States Senate in 1821 and supported William H. Crawford in the 1824 presidential election.John Quincy Adams won the 1824 election and Van Buren opposed his proposals for federally funded internal improvements and other measures.Van Buren's major political goal was to re-establish a two-party system with partisan differences based on ideology rather than personalities or sectional differences, and he supported Jackson's candidacy against Adams in the 1828 presidential election with this goal in mind.To support Jackson's candidacy, Van Buren ran for Governor of New York; he won, but resigned a few months after assuming the position to accept appointment as U.S. Secretary of State after Jackson took office in March 1829.Van Buren was a key advisor during Jackson's eight years as President of the United States and he built the organizational structure for the coalescing Democratic Party, particularly in New York.He resigned from his position to help resolve the Petticoat affair, then briefly served as the U.S. ambassador to the United Kingdom.At Jackson's behest, the 1832 Democratic National Convention nominated Van Buren for Vice President of the United States, and he took office after the Democratic ticket won the 1832 presidential election.With Jackson's strong support, Van Buren faced little opposition for the presidential nomination at the 1835 Democratic National Convention, and he defeated several Whig opponents in the 1836 presidential election.Van Buren's response to the Panic of 1837 centered on his Independent Treasury system, a plan under which the Federal government of the United States would store its funds in vaults rather than in banks.He also continued Jackson's policy of Indian removal; he maintained peaceful relations with Britain but denied the application to admit Texas to the Union, seeking to avoid heightened sectional tensions.In the 1840 election, the Whigs rallied around Harrison's military record and ridiculed Van Buren as "Martin Van Ruin", and a surge of new voters helped turn him out of office.At the opening of the Democratic convention in 1844, Van Buren was the leading candidate for the party's nomination for the presidency.Southern Democrats, however, were angered by his continued opposition to the annexation of Texas, and the party nominated James K. Polk.Van Buren grew increasingly opposed to slavery after he left office, and he agreed to lead a third party ticket in the 1848 presidential election, motivated additionally by intra-party differences at the state and national level.He finished in a distant third nationally, but his presence in the race most likely helped Whig nominee Zachary Taylor defeat Democrat Lewis Cass.Van Buren returned to the Democratic fold after the 1848 election, but he supported Abraham Lincoln's policies during the American Civil War.His health began to fail in 1861, and he died in July 1862, at age 79.He has been generally ranked as an average or below-average U.S. president by historians and political scientists.
Knowledge 1: Angelica Singleton Van Buren
Sarah Angelica Van Buren ("née" Singleton; February 13, 1818 – December 29, 1877), was the daughter-in-law of the eighth United States President Martin Van Buren.She was married to the President's son, Abraham Van Buren.She assumed the post of First Lady because the president's wife, Hannah Van Buren, had died 17 years earlier and he remained unwed throughout the rest of his life.Although she was never married to a president, she is the youngest woman ever to act as the White House hostess. [SEP] Knowledge 2: Abraham Van Buren
Abraham Van Buren II (November 27, 1807 – March 15, 1873) was the eldest son of Martin Van Buren, the eighth President of the United States and his wife, Hannah Hoes Van Buren.Van Buren was named in honor of his paternal grandfather who was an officer in the Continental Army during the Revolutionary War and was a career military man.
Knowledge 1: Angelica Singleton Van Buren
Sarah Angelica Van Buren ("née" Singleton; February 13, 1818 – December 29, 1877), was the daughter-in-law of the eighth United States President Martin Van Buren.She was married to the President's son, Abraham Van Buren.She assumed the post of First Lady because the president's wife, Hannah Van Buren, had died 17 years earlier and he remained unwed throughout the rest of his life.Although she was never married to a president, she is the youngest woman ever to act as the White House hostess. [SEP] Knowledge 2: John Van Buren
John Van Buren (February 18, 1810 – October 13, 1866) was a United States lawyer, official and politician.In addition to serving as a key advisor to his father, President Martin Van Buren, he was also Attorney General of New York from 1845 to 1847.A son of Hannah (née Hoes) and Martin Van Buren, John Van Buren graduated from Yale University, studied law, and attained admission to the bar in 1830.He served as secretary of the U.S. legation when Martin Van Buren was US Minister to Britain in 1831 and 1832, after which he practiced law in Albany, New York.He returned to England in from 1838 to 1839, and attended the Coronation of Queen Victoria.Van Buren served as New York's attorney general from 1845 to 1847, and was the chief prosecutor of the leaders of the Anti-Rent War.Van Buren later practiced law in New York City, where he developed a reputation as an effective trial attorney, with his memory for details and oratorical skills making him a formidable courtroom advocate.In 1848, Van Buren led the Barnburners—New York Democrats opposed to the election of Lewis Cass as president on the grounds that he was too friendly to slavery.Van Buren persuaded his father to run as the candidate of the Barnburners and the Free Soil Party in order to defeat Cass; Martin Van Buren won enough votes in New York to enable Zachary Taylor to defeat Cass and win the presidency.In Van Buren's later years he traveled extensively; he died aboard ship while en route from England to New York, and was buried at Albany Rural Cemetery.

Answer: March 15, 1873