question: What is the date of death of Armin, Prince Of Lippe's father?
context: [["Frederick Charles Augustus, Count of Lippe", ["Count Frederick Charles Augustus of Lippe- Biesterfeld( 20 January 1706 in Biesterfeld \u2013 31 July 1781 in Friedrichsruh) was a Count of Lippe and Lord of Lippe- Biesterfeld, Sternberg and Schwalenberg and a Knight of the Order of the Red Eagle.", "He was the eldest son of Rudolf Ferdinand of Lippe- Sternberg- Schwalenberg( 17 March 1671 \u2013 12 July 1736) and Louise Juliane of Kunowitz( 21 August 1671 \u2013 21 October 1754) and the grandson of Jobst Herman of Lippe- Biesterfeld."]], ["Armin, Prince of Lippe", ["Armin, Prince of Lippe (\"Armin Leopold Ernst Bruno Heinrich", "Willa August F\u00fcrst zur Lippe\"; 18 August 1924 \u2013 20 August 2015, also in Detmold) was the son of Leopold IV, Prince of Lippe and his second wife, Princess Anna of Ysenburg and B\u00fcdingen."]], ["Stephan, Prince of Lippe", ["Stephan, Prince of Lippe(\" Stephan Leopold Justus Richard\") was born on 24 May 1959 in Detmold, Germany.", "He is the son of Armin Leopold Ernst Bruno Heinrich Willa August Prince of Lippe and Traute Becker, and the head of the House of Lippe since 2015."]], ["Simon V, Count of Lippe", ["Count Simon V of Lippe (1471September 17, 1536) was Noble Lord of Lippe, and from 1528 Count of Lippe.", "During his reign, the Reformation was introduced in Lippe."]], ["Herman Adolph, Count of Lippe", ["Herman Adolph, Count of Lippe- Detmold( 1616 \u2013 1666) was a ruler of the county of Lippe."]], ["Otto, Lord of Lippe", ["Otto, Lord of Lippe was the ruling Count of Lippe- Lemgo from 1344 until his death."]], ["Leopold IV, Prince of Lippe", ["Leopold IV, Prince of Lippe (\"Leopold Julius Bernhard Adalbert Otto Karl Gustav\"; 30 May 1871 \u2013 30 December 1949) was the final sovereign of the Principality of Lippe.", "Succeeding to the throne in 1905 he had been governing the state since 1904 as regent."]], ["Ernest, Count of Lippe-Biesterfeld", ["Ernst, Count of Lippe- Biesterfeld(\" Ernst Kasimir Friedrich Karl Eberhard\"; 9 June 1842 \u2013 26 September 1904) was the head of the Lippe- Biesterfeld line of the House of Lippe.", "From 1897 until his death he was the regent of the Principality of Lippe."]], ["Prince Friedrich Wilhelm of Lippe", ["Friedrich Wilhelm of Lippe( born 7 September 1947) is a claimant to the headship of the House of Lippe."]], ["Leopold I, Prince of Lippe", ["Leopold I of Lippe( 2 December 1767 \u2013 5 November 1802) was a Prince of Lippe."]]]
supporting_facts: [["Armin, Prince of Lippe", 1], ["Leopold IV, Prince of Lippe", 0]]
evidences: [["Armin, Prince of Lippe", "father", "Leopold IV, Prince of Lippe"], ["Leopold IV, Prince of Lippe", "date of death", "30 December 1949"]]
answer: 30 December 1949