Question: Who was the father of the person who replaced Derby when he resigned in 1868?

full_context: Document 1: Queen Victoria: Palmerston died in 1865, and after a brief ministry led by Russell, Derby returned to power. In 1866, Victoria attended the State Opening of Parliament for the first time since Albert's death. The following year she supported the passing of the Reform Act 1867 which doubled the electorate by extending the franchise to many urban working men, though she was not in favour of votes for women. Derby resigned in 1868, to be replaced by Benjamin Disraeli, who charmed Victoria. "Everyone likes flattery," he said, "and when you come to royalty you should lay it on with a trowel." With the phrase "we authors, Ma'am", he complimented her. Disraeli's ministry only lasted a matter of months, and at the end of the year his Liberal rival, William Ewart Gladstone, was appointed prime minister. Victoria found Gladstone's demeanour far less appealing; he spoke to her, she is thought to have complained, as though she were "a public meeting rather than a woman".
Document 2: Gads Hill Place: Charles Dickens first saw the mansion when he was 9 years old in 1821, when his father John Dickens told Charles that if he worked hard enough, one day he would own it or just such a house. As a boy, Charles Dickens would often walk from Chatham to Gads Hill Place as he wished to see it again and again as an image of his possible future. Dickens was later to write, ``I used to look at it as a wonderful Mansion (which God knows it is not) when I was a very odd little child with the first faint shadows of all my books in my head - I suppose. ''Thirty - five years later, after Dickens had risen to fame and wealth, he discovered that the house was for sale and bought it for £1790 in March 1856 from fellow writer Eliza Lynn (later known as novelist Mrs. Eliza Lynn Linton). Initially Dickens bought the house as an investment, intending to let it, but changed his mind and used it instead as a country retreat, moving into the house in June 1857.
Document 3: Duff Cooper: Duff Cooper (he was always known as “Duff” rather than “Alfred”) was born at Cavendish Square on 22 February 1890. He was the only son of fashionable society doctor Sir Alfred Cooper (1843–1908), a surgeon and specialist in the sexual problems of the upper classes, and Lady Agnes Duff, daughter of James Duff, 5th Earl Fife. She had already eloped with two husbands, the first of whom she deserted and the second of whom died, before marrying Cooper in 1882. Duff Cooper had three older sisters. He had royal connections: his maternal uncle, the first Duke of Fife, was married to Louise, Princess Royal. Cooper enjoyed a typical gentleman's upbringing of country estates and London society. He attended two prep schools, including Wixenford School. He was unhappy at prep school, but was then very happy at Eton College. One of his maternal great-grandmothers was Lady Elizabeth FitzClarence, an illegitimate daughter of King William IV who fathered eight children with Dorothea Jordan.
Document 4: Isaac D'Israeli: Isaac D'Israeli (11 May 1766 – 19 January 1848) was a British writer, scholar and man of letters. He is best known for his essays, his associations with other men of letters, and as the father of British Prime Minister Benjamin Disraeli.
Document 5: Coningsby Disraeli: Born in Kensington, London, Disraeli was the son of Ralph Disraeli (1809–1898, the younger son of the writer Isaac D'Israeli). He was educated at Charterhouse School and New College, Oxford. The Prime Minister Benjamin Disraeli was his uncle. He inherited the Hughenden Manor estate acquired by his uncle on his father's death in 1898.
Document 6: George VI: The Duke and Duchess of York had two children: Elizabeth (called "Lilibet" by the family), and Margaret. The Duke and Duchess and their two daughters lived a relatively sheltered life at their London residence, 145 Piccadilly. They were a close and loving family. One of the few stirs arose when the Canadian Prime Minister, R. B. Bennett, considered the Duke for Governor General of Canada in 1931—a proposal that King George V rejected on the advice of the Secretary of State for Dominion Affairs, J. H. Thomas.
Document 7: Queen Victoria: On 14 January 1858, an Italian refugee from Britain called Orsini attempted to assassinate Napoleon III with a bomb made in England. The ensuing diplomatic crisis destabilised the government, and Palmerston resigned. Derby was reinstated as prime minister. Victoria and Albert attended the opening of a new basin at the French military port of Cherbourg on 5 August 1858, in an attempt by Napoleon III to reassure Britain that his military preparations were directed elsewhere. On her return Victoria wrote to Derby reprimanding him for the poor state of the Royal Navy in comparison to the French one. Derby's ministry did not last long, and in June 1859 Victoria recalled Palmerston to office.
Document 8: Queen Victoria: Russell's ministry, though Whig, was not favoured by the Queen. She found particularly offensive the Foreign Secretary, Lord Palmerston, who often acted without consulting the Cabinet, the Prime Minister, or the Queen. Victoria complained to Russell that Palmerston sent official dispatches to foreign leaders without her knowledge, but Palmerston was retained in office and continued to act on his own initiative, despite her repeated remonstrances. It was only in 1851 that Palmerston was removed after he announced the British government's approval of President Louis-Napoleon Bonaparte's coup in France without consulting the Prime Minister. The following year, President Bonaparte was declared Emperor Napoleon III, by which time Russell's administration had been replaced by a short-lived minority government led by Lord Derby.
Document 9: Queen Victoria: At the time of her accession, the government was led by the Whig prime minister Lord Melbourne, who at once became a powerful influence on the politically inexperienced Queen, who relied on him for advice. Charles Greville supposed that the widowed and childless Melbourne was "passionately fond of her as he might be of his daughter if he had one", and Victoria probably saw him as a father figure. Her coronation took place on 28 June 1838 at Westminster Abbey. Over 400,000 visitors came to London for the celebrations. She became the first sovereign to take up residence at Buckingham Palace and inherited the revenues of the duchies of Lancaster and Cornwall as well as being granted a civil list allowance of £385,000 per year. Financially prudent, she paid off her father's debts.
Document 10: Edgar Chatfeild-Clarke: Edgar Chatfeild-Clarke was educated at King's College School and privately in Dresden in the German state of Saxony. He was a cousin of Joseph Chamberlain. He never married.
Document 11: Queen Victoria: Between April 1877 and February 1878, she threatened five times to abdicate while pressuring Disraeli to act against Russia during the Russo-Turkish War, but her threats had no impact on the events or their conclusion with the Congress of Berlin. Disraeli's expansionist foreign policy, which Victoria endorsed, led to conflicts such as the Anglo-Zulu War and the Second Anglo-Afghan War. "If we are to maintain our position as a first-rate Power", she wrote, "we must ... be Prepared for attacks and wars, somewhere or other, CONTINUALLY." Victoria saw the expansion of the British Empire as civilising and benign, protecting native peoples from more aggressive powers or cruel rulers: "It is not in our custom to annexe countries", she said, "unless we are obliged & forced to do so." To Victoria's dismay, Disraeli lost the 1880 general election, and Gladstone returned as prime minister. When Disraeli died the following year, she was blinded by "fast falling tears", and erected a memorial tablet "placed by his grateful Sovereign and Friend, Victoria R.I."
Document 12: Alistair Darling: Alistair Darling was born in London the son of a civil engineer, Thomas, and his wife, Anna MacLean. He is the great-nephew of Sir William Darling, a Conservative/Unionist Member of Parliament for Edinburgh South (1945–1957) who had served as Lord Provost of Edinburgh during the Second World War. He was educated at Chinthurst School, in Tadworth, Surrey, then in Kirkcaldy, and at the private Loretto School, in Musselburgh. He attended the University of Aberdeen, from where he graduated as a Bachelor of Laws (LL.B). He became the President of Aberdeen University Students' Representative Council.
Document 13: Prime minister: Walpole always denied that he was "prime minister", and throughout the 18th century parliamentarians and legal scholars continued to deny that any such position was known to the Constitution. George II and George III made strenuous efforts to reclaim the personal power of the monarch, but the increasing complexity and expense of government meant that a minister who could command the loyalty of the Commons was increasingly necessary. The long tenure of the wartime prime minister William Pitt the Younger (1783–1801), combined with the mental illness of George III, consolidated the power of the post. The title was first referred to on government documents during the administration of Benjamin Disraeli but did not appear in the formal British Order of precedence until 1905.
Document 14: Dudley McGarel-Hogg, 3rd Baron Magheramorne: He was the second son of James McGarel-Hogg, 1st Baron Magheramorne and was educated at Radley College. He inherited the peerage from his brother in 1903. Like his father, Magheramorne was a Conservative and Unionist.
Document 15: Prime minister: From 1721 this was the Whig politician Robert Walpole, who held office for twenty-one years. Walpole chaired cabinet meetings, appointed all the other ministers, dispensed the royal patronage and packed the House of Commons with his supporters. Under Walpole, the doctrine of cabinet solidarity developed. Walpole required that no minister other than himself have private dealings with the king, and also that when the cabinet had agreed on a policy, all ministers must defend it in public, or resign. As a later prime minister, Lord Melbourne, said, "It matters not what we say, gentlemen, so long as we all say the same thing."
ground_truth: Isaac D'Israeli
sub_queries: Who replaced Derby when he resigned in 1868? Answer: Benjamin Disraeli
Benjamin Disraeli >> father Answer: Isaac D'Israeli