question: Who is the paternal grandfather of Trịnh Doanh?
context: [["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."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["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"]], ["Zhao Shoushan", ["Zhao Shoushan( 12 November 1894 \u2013 20 June 1965) was a KMT general and later Chinese Communist Party politician.", "He is the grandfather of Zhao Leji."]], ["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["Tr\u1ecbnh C\u01b0\u01a1ng", ["Tr\u1ecbnh C\u01b0\u01a1ng (1686\u20131729) was the lord who ruled Tonkin from 1709 to 1729 (his title as ruler was \"An \u0110\u00f4 V\u01b0\u01a1ng\").", "Tr\u1ecbnh C\u01b0\u01a1ng was born to Tr\u1ecbnh B\u00ednh, a grandson of the former lord Tr\u1ecbnh C\u0103n.", "He belonged to the line of Tr\u1ecbnh Lords who had ruled parts of Vietnam since 1545.", "Like his great-grandfather and predecessor, Tr\u1ecbnh C\u0103n, his reign was mostly devoted to administrative reforms."]], ["Tr\u1ecbnh Doanh", ["Tr\u1ecbnh Doanh (4 December 1720 \u2013 15 February 1767) ruled northern Vietnam (Tonkin) from 1740 to 1767 (he ruled with the title \"Minh \u0110\u00f4 V\u01b0\u01a1ng\").", "Tr\u1ecbnh Doanh was a third son of Tr\u1ecbnh C\u01b0\u01a1ng, and belonged to the line of Tr\u1ecbnh Lords who ruled northern Vietnam.", "His rule was spent putting down rebellions against rule by the Tr\u1ecbnh.", "Tr\u1ecbnh Doanh took over from his brother, Tr\u1ecbnh Giang, who, through financial mismanagement and bad behavior, provoked a wave of revolts against his rule.", "This was a time of increasing peasant revolts in both the north and the south under the Nguy\u1ec5n Lords.", "In the north, some of the revolts were apparently led by members of the royal L\u00ea family.", "The rebellions which broke out in Tonkin during this period, were almost without number.", "Princes belonging to the royal family, generals, civil mandarins, common people, and out-casts from the hills, all rose in the provinces against the tyranny of the Tr\u1ecbnh, as well as for their personal interests.", "Chapter 16 (continued)", "Despite the many revolts, Tr\u1ecbnh Doanh defeated them all and passed the rule of Vietnam to his son,", "Tr\u1ecbnh S\u00e2m.", "As far as the L\u00ea Dynasty was concerned, there was just one emperor, L\u00ea Hien T\u00f4ng (1740\u20131786), who occupied the royal throne in Hanoi."]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["Nguy\u1ec5n Th\u1ecb Ng\u1ecdc Di\u1ec5m", ["Nguy\u1ec5n Th\u1ecb Ng\u1ecdc Di\u1ec5m( 1721- 1784), posthumous name T\u1eeb Tr\u1ea1ch( \u6148\u6fa4), was a consort of lord Tr\u1ecbnh Doanh."]], ["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."]]]
supporting_facts: [["Tr\u1ecbnh Doanh", 1], ["Tr\u1ecbnh C\u01b0\u01a1ng", 1]]
evidences: [["Tr\u1ecbnh Doanh", "father", "Tr\u1ecbnh C\u01b0\u01a1ng"], ["Tr\u1ecbnh C\u01b0\u01a1ng", "father", "Tr\u1ecbnh B\u00ednh"]]
answer: Trịnh Bính