question: Who is Claire Annabel Caroline Grant Duff's paternal grandfather?
context: [["Claire Annabel Caroline Grant Duff", ["Claire Annabel Caroline Grant Duff (25 December 1870 \u2013 12 January 1944) was a poet, writer and high society hostess.", "She published her memoir \"A Victorian Childhood\" in 1932 with Methuen Publishing.", "She was the eldest daughter of Sir Mountstuart Grant Duff and Anna Julia Webster.", "She was the author of \"A Victorian Childhood\", which was published in 1932, under the pen name Annabel Jackson.", "In 1894, she married in Frederick Huth Jackson, a partner in the private bank, Frederick Huth and Sons.", "They had one son, Frederick who married Helen Vinogradoff, daughter of the distinguished historian Sir Paul Vinogradoff, and three daughters: Konradin, later Lady Arthur Hobhouse; Anne, later Anne Fremantle; and Claire, later Countess de Loriol Chandieu."]], ["Fred Le Deux", ["Frederick\" Fred\" Le Deux( born 4 December 1934) was an Australian rules footballer who played with Geelong in the Victorian Football League( VFL).", "He is the grandfather of Tom Hawkins."]], ["Henry Krause", ["Henry J.\" Red\" Krause, Jr.( August 28, 1913 \u2013 February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.", "He played college football at St. Louis University.", "He is the grandfather of Jennifer Krause", "He is the great grandfather of Payton Hoeing"]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["Kaya Alp", ["Kaya Alp was, according to Ottoman tradition, the son of K\u0131z\u0131l Bu\u011fa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertu\u011frul, and the great grandfather of the Ottoman Empire founder, Osman I."]], ["Arthur Grant Duff", ["Sir Arthur Cuninghame Grant Duff, (23 May 1861 \u2013 11 April 1948) was a British diplomat who was Minister to several countries."]], ["Evelyn Grant Duff", ["Sir Evelyn Mountstuart Grant Duff( 9 October", "1863 \u2013 19 September 1926) was a British diplomat who was stationed in Iran at a key moment, and was ambassador to Switzerland.", "He was the second son of M.E. Grant Duff( later Sir Mountstuart Grant Duff).", "He passed the Preliminary Examination for the Civil Services in 1883 and entered the Diplomatic Service in 1888.", "He served in Rome, Tehran, St Petersburg, Stockholm and Berlin before a post in London 1899 \u2013 1903.", "He was Secretary of Legation in Tehran 1903 \u2013 06.", "In the summer of 1906 there was no minister( ambassador) in post \u2013 the previous minister, Sir Arthur Hardinge, had left in 1905 and the new minister, Sir Cecil Spring Rice, although appointed in December 1905, did not leave England until September 1906 \u2013 so Grant Duff was the senior British diplomat in Tehran when, during the Persian Constitutional Revolution, about 12,000 men took sanctuary(\" bast\") in the gardens of the British Legation in what has been called a' vast open- air school of political science' studying constitutionalism.", "The Foreign Secretary, Sir Edward Grey, was outraged by Grant Duff's hospitality towards the\" bastis\" which, however, inadvertently expedited the Constitutional Revolution.", "Grant Duff had already been appointed to be Councillor at the Embassy in Madrid and he took up that post in late 1906.", "While in Madrid he negotiated the purchase of land at the corner of calle de N\u00fa\u00f1ez de Balboa and calle de Hermosilla for a British Embassy Church.", "Building did not start until 1923, and it was dedicated as the Church of St George in 1925.", "In 1910 Grant Duff was appointed Minister to Venezuela, but he did not take up the post; he was Consul- General to the Kingdom of Hungary, in Budapest, 1911 \u2013 13 before his final post as British Envoy to the Swiss Confederation, 1913 \u2013 16.", "He was appointed CMG in 1911 and knighted KCMG in 1916 on the termination of his mission in Berne.", "In 1900 he married Edith Florence Bonham, elder daughter of Sir George Bonham, 2nd Baronet( who was British Envoy to the Swiss Confederation, 1905 \u2013 09).", "She was appointed a Lady of Grace of the Order of St John of Jerusalem in 1916 and CBE in 1918 as\" Founder and Organiser of the Bread Bureau for Prisoners of War.\"", "She founded the\" British Legation Red Cross Organization\" through which the many British expatriates in Switzerland helped wounded soldiers in French and British hospitals."]], ["M. E. Grant Duff", ["Sir Mountstuart Elphinstone Grant Duff (21 February 1829 \u2013 12 January 1906), known as M. E. Grant Duff before 1887 and as Sir Mountstuart Grant Duff thereafter, was a Scottish politician, administrator and author.", "He served as the Under-Secretary of State for India from 1868 to 1874, Under-Secretary of State for the Colonies from 1880 to 1881 and the Governor of Madras from 1881 to 1886.", "He was born in Eden, Aberdeenshire, on 21 February 1829 to the distinguished British historian James Grant Duff.", "He had his education at Grange School and Balliol College, Oxford and graduated in law from the Inns of Court.", "He practised and taught law for a short time before starting a political life and entering the House of Commons as the Liberal Member of Parliament for Elgin Burghs.", "His abilities won him government positions and he was Under-Secretary of State for India, Under-Secretary of State for the Colonies and Governor of Madras.", "On his return from Madras, he retired from politics and served in various art and scientific societies.", "He travelled extensively and wrote voluminously.", "His performance in politics and administration has received mixed reviews during the 1880s\na politician of brilliant promise and scant performance, of wide information which he seemed to turn to much account, of abilities which would have made the fortunes of half a dozen men and of which he made little enough.", "He was made a Companion of the Order of the Indian Empire and a Grand Commander of the Order of the Star of India.", "He died on 12 January 1906 at the age of 76."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["James Grant Duff", ["James Grant Duff (8 July 1789 \u2013 23 September 1858) was a British soldier and historian from Scotland, who was active in British India."]]]
supporting_facts: [["Claire Annabel Caroline Grant Duff", 2], ["M. E. Grant Duff", 2]]
evidences: [["Claire Annabel Caroline Grant Duff", "father", "Sir Mountstuart Grant Duff"], ["Sir Mountstuart Grant Duff", "father", "James Grant Duff"]]
answer: James Grant Duff