question: Who is the paternal grandfather of Petre Bagration-Gruzinsky?
context: [["Petre Gruzinsky", ["Prince Petre Petres dze Bagrationi Gruzinsky( 28 March 1920 \u2013 13 August 1984) was a Georgian poet and Honored Artist of the Georgian SSR( 1979).", "He was a son of Prince Petre Bagration- Gruzinsky and a scion of King George XII of Georgia."]], ["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."]], ["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."]], ["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["Alexander Bagration-Gruzinsky", ["Aleksandre Bagratis dze Bagrationi Gruzinsky  (1820-1865) was a Georgian prince (\"batonishvili\"), a descendant of the Kakhetian branch (Gruzinsky) of the Bagrationi dynasty, the former royal house of Georgia.", "Alexander was a son of Prince Bagrat of Georgia, the 4th son of king George XII of Georgia."]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["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"]], ["Petre Bagration-Gruzinsky", ["Petre Aleksandres dze Bagrationi Gruzinsky  (26 April 1857 \u2013 3 February 1922) was a Georgian prince (\"batonishvili\"), a descendant of the Kakhetian branch (Gruzinsky) of the Bagrationi dynasty, the former royal house of Georgia.", "Petre was the son of Prince Alexander Bagration-Gruzinsky.", "Prince Petre married Princess Tamara Dekanozishvili (1897\u20131977) at the Navtlugi Church of St. Barbara in Tbilisi in 1915 and had two sons:"]], ["Ana Bagration-Gruzinsky", ["Ana Nugzaris asuli Bagration- Gruzinsky( born 1 November 1976) is a royal princess of the Gruzinsky branch of the Bagrationi dynasty of Georgia."]]]
supporting_facts: [["Petre Bagration-Gruzinsky", 1], ["Alexander Bagration-Gruzinsky", 1]]
evidences: [["Petre Bagration-Gruzinsky", "father", "Alexander Bagration-Gruzinsky"], ["Alexander Bagration-Gruzinsky", "father", "Bagrat of Georgia"]]
answer: Bagrat of Georgia