question: Who is the paternal grandfather of Prince Carl Christian Of Hohenzollern?
context: [["Christian of Oliva", ["Christian of Oliva, also Christian of Prussia( died 4 December 1245) was the first missionary bishop of Prussia."]], ["Frederick XI, Count of Hohenzollern", ["Friedrich XI, Count of Hohenzollern( died 26 November 1401), nicknamed\" Friedrich the Elder\" was a German nobleman.", "He was a member of the House of Hohenzollern and a ruling Count of Hohenzollern- Hechingen."]], ["Prince Karl Anton of Hohenzollern", ["Prince Karl Anton of Hohenzollern- Sigmaringen( 1 September 1868 \u2013 21 February 1919) was a member of the Princely House of Hohenzollern- Sigmaringen.", "Karl Anton was the third and youngest son of Leopold, Prince of Hohenzollern and his wife Infanta Ant\u00f3nia of Portugal.", "Karl Anton's elder brothers were William, Prince of Hohenzollern and Ferdinand I of Romania."]], ["Prince Carl Christian of Hohenzollern", ["Prince Carl Christian of Hohenzollern (born 5 April 1962) is the eldest child of Prince Johann Georg of Hohenzollern and of his wife Princess Birgitta of Sweden, sister of King Carl XVI Gustaf of Sweden."]], ["Johann, Prince of Hohenzollern-Sigmaringen", ["Prince Johann of Hohenzollern- Sigmaringen( 17 August 1578 in Sigmaringen \u2013 22 March 1638 in Munich), was the ruling Count of Hohenzollern- Sigmaringen from 1606 to 1623.", "He was elevated to the rank of prince in 1623 and so was\" Prince\" of Hohenzollern- Sigmaringen from 1623 until his death."]], ["Friedrich Wilhelm, Prince of Hohenzollern", ["Friedrich Wilhelm, Prince of Hohenzollern( 3 February 1924 \u2013 16 September 2010) was the head of the Princely House of Hohenzollern for over 45 years."]], ["Jobst Nikolaus I, Count of Hohenzollern", ["Jobst Nikolaus I, Count of Hohenzollern( also known as\" Jost Nikolaus I\" or\" Jos Nikolaus I\"; 1433 \u2013 9 February 1488) was a German nobleman from the Swabian branch of the House of Hohenzollern.", "He was the ruling Count of Hohenzollern from shortly after his birth until his death."]], ["Frederick XII, Count of Hohenzollern", ["Friedrich XII, Count of Hohenzollern, nickname Friedrich the Oettinger( before 1401 \u2013 1443) was a German nobleman.", "He was a member of the Swabian branch of the House of Hohenzollern.", "His father was Friedrich XI, Count of Hohenzollern; his younger brother and rival was Eitel Friedrich I, Count of Hohenzollern."]], ["Prince Ferfried of Hohenzollern", ["Ferfried of Hohenzollern( born 14 April 1943) is a member of the princely House of Hohenzollern- Sigmaringen and former champion race car driver."]], ["Prince Johann Georg of Hohenzollern", ["Johann Georg, Prince von Hohenzollern (\"Johann Georg", "Carl Leopold Eitel-Friedrich Meinrad Maria Hubertus Michael\"; 31 July 1932 \u2013 2 March 2016) was a German prince, and through his marriage to Princess Birgitta of Sweden, was brother-in-law of King Carl XVI Gustaf of Sweden.", "Prince Johann Georg was the sixth child of Frederick, Prince of Hohenzollern", "(Heiligendamm 30 August 1891 \u2013 Krauchenwies 6 February 1965) and his wife Princess Margarete Karola of Saxony", "(Dresden 24 January 1900 \u2013 Freiburg im Breisgau 16 October 1962)."]]]
supporting_facts: [["Prince Carl Christian of Hohenzollern", 0], ["Prince Johann Georg of Hohenzollern", 2]]
evidences: [["Prince Carl Christian of Hohenzollern", "father", "Prince Johann Georg of Hohenzollern"], ["Prince Johann Georg of Hohenzollern", "father", "Frederick, Prince of Hohenzollern"]]
answer: Frederick, Prince of Hohenzollern