question: Who is Bernhard V, Prince Of Anhalt-Bernburg's paternal grandfather?
context: [["Bernhard IV, Prince of Anhalt-Bernburg", ["Bernhard IV, Prince of Anhalt- Bernburg( died 28 June 1354) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.", "He was the eldest son of Bernhard III, Prince of Anhalt- Bernburg, by his first wife Agnes, daughter of Rudolf I, Duke of Saxe- Wittenberg and Elector of Saxony."]], ["Otto III, Prince of Anhalt-Bernburg", ["Otto III, Prince of Anhalt- Bernburg( died 27 February 1404) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.", "He was the youngest son of Bernhard III, Prince of Anhalt- Bernburg, by his third wife Matilda, daughter of Magnus I, Duke of Brunswick- G\u00f6ttingen."]], ["Bernhard III, Prince of Anhalt-Bernburg", ["Bernhard III, Prince of Anhalt- Bernburg( died 20 August 1348) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.", "He was the eldest son of Bernhard II, Prince of Anhalt- Bernburg, by his wife Helene, daughter of Wizlaw II, Prince of R\u00fcgen."]], ["Bernhard II, Prince of Anhalt-Bernburg", ["Bernhard II, Prince of Anhalt- Bernburg( ca. 1260 \u2013 aft. 26 December 1323), was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.", "He was the third son of Bernhard I, Prince of Anhalt- Bernburg, by his wife Princess Sophie, daughter of King Abel of Denmark."]], ["Henry IV, Prince of Anhalt-Bernburg", ["Henry IV, Prince of Anhalt-Bernburg (died 7 July 1374) was a German prince of the House of Ascania and ruler of the principality of Anhalt-Bernburg.", "He was the second son of Bernhard III, Prince of Anhalt-Bernburg, by his first wife Agnes, daughter of Rudolf I, Duke of Saxe-Wittenberg."]], ["Bernhard VI, Prince of Anhalt-Bernburg", ["Bernhard VI, Prince of Anhalt- Bernburg( died 2 February 1468) was a German prince of the House of Ascania and ruler of the Principality of Anhalt- Bernburg.", "He was the eldest son of Otto III, Prince of Anhalt- Bernburg, by his first unknown wife."]], ["Otto IV, Prince of Anhalt-Bernburg", ["Otto IV, Prince of Anhalt- Bernburg( died 1 May 1415) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.", "He was the youngest son of Otto III, Prince of Anhalt- Bernburg, by his unknown first wife."]], ["Bernhard I, Prince of Anhalt-Bernburg", ["Bernhard I, Prince of Anhalt- Bernburg( c. 1218\u20131287) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.", "He was the second son of Henry I, Count of Anhalt( who was elevated to the rank of prince in 1218), by his wife Irmgard, daughter of Hermann I, Landgrave of Thuringia."]], ["John I, Prince of Anhalt-Bernburg", ["John I, Prince of Anhalt- Bernburg( died 5 June 1291) was a German prince of the House of Ascania and ruler of the principality of Anhalt- Bernburg.", "He was the eldest son of Bernhard I, Prince of Anhalt- Bernburg, by his wife Princess Sophie, daughter of King Abel of Denmark."]], ["Bernhard V, Prince of Anhalt-Bernburg", ["Bernhard V, Prince of Anhalt-Bernburg (died 24 June 1420) was a German prince of the House of Ascania and ruler of the principality of Anhalt-Bernburg.", "He was the eldest son of Henry IV, Prince of Anhalt-Bernburg, by his wife Sophie, a possible member of the House of Stolberg."]]]
supporting_facts: [["Bernhard V, Prince of Anhalt-Bernburg", 1], ["Henry IV, Prince of Anhalt-Bernburg", 1]]
evidences: [["Bernhard V, Prince of Anhalt-Bernburg", "father", "Henry IV, Prince of Anhalt-Bernburg"], ["Henry IV, Prince of Anhalt-Bernburg", "father", "Bernhard III"]]
answer: Bernhard III