Question: What was the date of death of Anne Fitzalan-Howard, former Duchess of the county where the settlement of Ostend can be found?

full_context: Document 1: Stratton Strawless: Stratton Strawless is a village in the county of Norfolk and district of Broadland. The civil parish covers and has a population of 495, increasing to a population of 580 in the 2011 Census. Located close and to the east of the A140 road and being south of the market town of Aylsham and some north of Norwich. Much of the parish has been given over to the growing of arable crops, but there are substantial amounts of mixed woodland to be found.
Document 2: East Norwich, New York: East Norwich is a hamlet and census-designated place (CDP) located within the town of Oyster Bay in Nassau County, New York, United States. The population was 2,709 at the 2010 census. East Norwich was originally named Norwich, until the postal service requested the name change to eliminate confusion from the other Norwich, in Chenango County.
Document 3: Princess Katherine of Greece and Denmark: Princess Katherine of Greece and Denmark (; 4 May 1913 – 2 October 2007), styled in the UK as Lady Katherine Brandram from 1947 till her death, was the third daughter and youngest child of King Constantine I of Greece and Sophia of Prussia.
Document 4: Anne Devereux: She was born in Bodenham, the daughter of Sir Walter Devereux, the Lord Chancellor of Ireland, and his wife Elizabeth Merbury. Anne's grandfather, Walter, was the son of Agnes Crophull. By Crophull's second marriage to Sir John Parr, Anne was a cousin to the Parr family which included Sir Thomas Parr; father of King Henry VIII's last queen consort, Catherine Parr.
Document 5: Port of Lowestoft: The Port of Lowestoft is a harbour in Lowestoft in the English county of Suffolk owned by Associated British Ports. It is the most easterly harbour in the United Kingdom and has direct sea access to the North Sea. The harbour is made up of two sections divided by a bascule bridge. The inner harbour is formed by Lake Lothing whilst the outer harbour is constructed from breakwaters.
Document 6: Ostend, Norfolk: Ostend is a coastal settlement in the English county of Norfolk. The population is included in the civil parish of Walcott.
Document 7: Sophia of Hanover: Although considerably older than Queen Anne, Sophia enjoyed much better health. According to the Countess of Bückeburg in a letter to Sophia's niece, the Raugravine Luise, on 5 June 1714 Sophia felt ill after receiving an angry letter from Queen Anne. Two days later she was walking in the gardens of Herrenhausen when she ran to shelter from a sudden downpour of rain and collapsed and died, aged 83—a very advanced age for the era. Just over a month later, in August, Queen Anne died at the age of 49. Had Anne predeceased Sophia, Sophia would have been the oldest person to ascend the British throne.
Document 8: Anne, Princess Royal: At the age of 21, Anne won the individual title at the European Eventing Championship, and was voted the BBC Sports Personality of the Year in 1971. For more than five years, she also competed with the British eventing team, winning a silver medal in both individual and team disciplines in the 1975 European Eventing Championship, riding the home - bred Doublet. The following year, Anne participated in the 1976 Olympic Games in Montreal as a member of the British team, riding the Queen's horse, Goodwill. Anne assumed the Presidency of the Fédération Équestre Internationale from 1986 until 1994. On 5 February 1987, she became the first member of the Royal Family to appear as a contestant on a television quiz - show when she competed on the BBC panel game A Question of Sport.
Document 9: Anne Boleyn: Anne's family also profited from the relationship. Her father, already Viscount Rochford, was created Earl of Wiltshire. Henry also came to an arrangement with Anne's Irish cousin and created him Earl of Ormond. At the magnificent banquet to celebrate her father's elevation, Anne took precedence over the Duchesses of Suffolk and Norfolk, seated in the place of honour beside the King which was usually occupied by the Queen. Thanks to Anne's intervention, her widowed sister Mary received an annual pension of £100, and Mary's son, Henry Carey, was educated at a prestigious Cistercian monastery.
Document 10: Anne Fitzalan-Howard, Duchess of Norfolk: Anne Mary Teresa Fitzalan-Howard, Duchess of Norfolk, ("née" Constable-Maxwell; 30 August 1927 – 8 April 2013) was a British peeress and humanitarian.
Document 11: Emneth: Emneth is a village and a civil parish in the English county of Norfolk. The village is west of Norwich, south-west of King's Lynn and north of London. The nearest town is Wisbech which is north-north-west of the village. The Village lies to the south-west of the route of the A47 between Peterborough and King's Lynn. The nearest railway station is at Downham Market for the Fen Line which runs between King's Lynn and Cambridge. The nearest airport is Cambridge International Airport. The parish of Emneth in the 2001 census, has a population of 2,466, increasing to 2,617 at the 2011 Census. For the purposes of local government, the parish falls within the district of King's Lynn and West Norfolk.
Document 12: Queen Elizabeth The Queen Mother: Elizabeth Angela Marguerite Bowes - Lyon (4 August 1900 -- 30 March 2002) was the wife of King George VI and the mother of Queen Elizabeth II and Princess Margaret, Countess of Snowdon. She was Queen consort of the United Kingdom and the Dominions from her husband's accession in 1936 until his death in 1952, after which she was known as Queen Elizabeth The Queen Mother, to avoid confusion with her daughter. She was the last Empress of India.
Document 13: Anne, Princess Royal and Princess of Orange: Anne, Princess Royal and Princess of Orange (2 November 1709 – 12 January 1759) was the second child and eldest daughter of King George II of Great Britain and his consort Caroline of Ansbach. She was the spouse of William IV, Prince of Orange, the first hereditary stadtholder of all seven provinces of the Northern Netherlands. She was Regent of the Netherlands from 1751 until her death in 1759, exercising extensive powers on behalf of her son William V. She was known as an Anglophile, due to her English upbringing and family connections, but was unable to convince the Dutch Republic to enter the Seven Years' War on the side of the British. Princess Anne was the second daughter of a British sovereign to hold the title Princess Royal. In the Netherlands she was sometimes known as Anna van Hannover.
Document 14: Pattesley: Pattesley is a very small village in the English county of Norfolk. It is located about one mile south of the village of Oxwick and consists of a few scattered houses. The population is included in the civil parish of Colkirk.
Document 15: Oxwick: Oxwick is a hamlet in the English county of Norfolk. It lies close to the source of the River Wensum and lies one mile south of the village of Colkirk .
ground_truth: 8 April 2013
sub_queries: Ostend >> located in the administrative territorial entity Answer: Norfolk
On which date did Anne Fitzalan-Howard, Duchess of Norfolk die? Answer: 8 April 2013