question: Who is the paternal grandfather of Charles Andrew Bruce?
context: [["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["Andrew Pasterfield", ["Andrew Bruce Pasterfield, is a Paralympic swimmer from Australia."]], ["Cy Casper", ["Charles Andrew\" Cy\" Casper( May 28, 1912 \u2013 March 7, 1968) was a player in the National Football League."]], ["Charles Andrew Bruce", ["Charles Andrew Bruce (1768\u20131810) was briefly Governor of Prince of Wales Island (now called Penang) from March 24, 1810, until his death in office in December 1810.", "Bruce was one of the sons of Charles Bruce, 5th Earl of Elgin and Martha Bruce, Countess of Elgin and Kincardine (1739\u20131810) and a brother of the collector Thomas Bruce, 7th Earl of Elgin, known for bringing the Elgin Marbles from Athens.", "The \"Prince of Wales Island Gazette Extra\" of 21 March 1810 recorded the appointment and arrival of Charles Andrew Bruce as Governor and the appointment of Colonel Norman Macalister and William Edward Phillips as members of Council."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["Andrew Abel", ["Andrew Bruce Abel( born December 3, 1952) is an American economist, a professor in the Department of Finance in The Wharton School of the University of Pennsylvania."]], ["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."]], ["Charles Orr (socialist)", ["Charles Andrew Orr( November 15, 1906 \u2013 August 15, 1999) was an American economist and socialist."]], ["Charles Bruce, 5th Earl of Elgin", ["Charles Bruce, 5th Earl of Elgin and 9th Earl of Kincardine (6 July 1732 \u2013 14 May 1771) was the son of William Bruce, 8th Earl of Kincardine.", "His mother was Janet Roberton, daughter of James Roberton (principal Lord of Session) and great-granddaughter of advocate and judge Lord Bedlay", "On 1 June 1759, he married Martha Whyte (1739-1810, who later became governess to Princess Charlotte of Wales.", "They had eight children:", "Elgin was Grand Master of Scottish Freemasons from 1761 to 1763 and a founding member of the Royal and Ancient Golf Club of St Andrews.", "He built the planned industrial village of Charlestown, Fife.", "He is buried in the southern transept of Dunfermline Abbey close to the grave of Robert the Bruce."]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]]]
supporting_facts: [["Charles Andrew Bruce", 1], ["Charles Bruce, 5th Earl of Elgin", 0]]
evidences: [["Charles Andrew Bruce", "father", "Charles Bruce, 5th Earl of Elgin"], ["Charles Bruce, 5th Earl of Elgin", "father", "William Bruce, 8th Earl of Kincardine"]]
answer: William Bruce, 8th Earl of Kincardine