question: When did William Christoph, Landgrave Of Hesse-Homburg's father die?
context: [["Christine Wilhelmine of Hesse-Homburg", ["Landgravine Christine Wilhelmine of Hesse- Homburg( 30 June 1653, in Bingenheim \u2013 16 May 1722, in Grabow) was a German noblewoman.", "She was the eldest daughter of William Christoph, Landgrave of Hesse- Homburg and his first wife Sophia Eleonore of Hesse- Darmstadt."]], ["Frederick IV, Landgrave of Hesse-Homburg", ["Frederick IV Charles Louis William of Hesse- Homburg( 15 April 1724 in Braunfels \u2013 7 February 1751 in Bad Homburg), was Landgrave of Hesse- Homburg."]], ["Gustav, Landgrave of Hesse-Homburg", ["Gustav, Landgrave of Hesse- Homburg( 17 February 1781 \u2013 8 September 1848) was landgrave of the German state of Hesse- Homburg from 1846 to 1848."]], ["Frederick I, Landgrave of Hesse-Homburg", ["Frederick I of Hesse-Homburg (5 March 1585, at Lichtenberg Castle in Fischbachtal \u2013 9 May 1638, in Bad Homburg), was the first Landgrave of Hesse-Homburg and founder of the eponymous family line."]], ["Frederick William, Prince of Solms-Braunfels", ["Prince Frederick William of Solms- Braunfels( 11 January 1696 in Braunfels \u2013 24 February 1761, Braunfels) was the first Prince of Solms- Braunfels.", "He was the son of Count William Maurice of Solms- Braunfels( 1651 \u2013 1724) and his wife Magdalene Sophie of Hesse- Homburg( 1660 \u2013 1720), a daughter of William Christoph, Landgrave of Hesse- Homburg, and his first wife."]], ["Philip, Landgrave of Hesse-Homburg", ["Philip August Frederick\" Landgrave of Hesse- Homburg\"( 11 March 1779 in Homburg \u2013 15 December 1846, ibid) was a field marshal in the imperial Austrian army.", "He was the ruling Landgrave of Hesse- Homburg from 1839 until his death."]], ["Frederick III, Landgrave of Hesse-Homburg", ["Frederick III James of Hesse- Homburg( born 19 May 1673 in C\u00f6lln; died: 8 June 1746 in's- Hertogenbosch) was a Landgrave of Hesse- Homburg"]], ["Louis William, Landgrave of Hesse-Homburg", ["Louis William, Landgrave of Hesse- Homburg( 29 August 1770 in Homburg \u2013 19 January 1839 in Luxembourg), was Landgrave of Hesse- Homburg from 1829 until his death."]], ["Landgravine Auguste of Hesse-Homburg", ["Landgravine\" Auguste\" Fredericka of Hesse- Homburg( full German name:\" Auguste Friederike, Landgr\u00e4fin von Hessen- Homburg\"; 28 November 1776, Bad Homburg vor der H\u00f6he, Landgraviate of Hesse- Homburg, Holy Roman Empire \u2013 1 April 1871, Ludwigslust, Grand Duchy of Mecklenburg- Schwerin), was a member of the House of Hesse and a Landgravine of Hesse- Homburg by birth.", "Through her marriage she was also a member of the House of Mecklenburg and Hereditary Grand Duchess of Mecklenburg- Schwerin.", "She was the sixth child and fourth daughter of Frederick V, Landgrave of Hesse- Homburg and his wife Landgravine Caroline of Hesse- Darmstadt, in turn daughter of Louis IX, Landgrave of Hesse- Darmstadt."]], ["William Christoph, Landgrave of Hesse-Homburg", ["William Christoph of Hesse-Homburg (13 November 1625, Ober-Rosbach \u2013 27 August 1681, then in Bingenheim, now in Echzell) was the second Landgraf of Hesse-Homburg (then known as \"Landgraf of Bingenheim\") during 1648-1669.", "He was the third (second surviving) of five sons of Frederick I, Landgrave of Hesse-Homburg, and succeeded his brother", "Ludwig I as Landgrave in 1643, but", "his mother was regent until 1648."]]]
supporting_facts: [["William Christoph, Landgrave of Hesse-Homburg", 1], ["Frederick I, Landgrave of Hesse-Homburg", 0]]
evidences: [["William Christoph of Hesse-Homburg", "father", "Frederick I, Landgrave of Hesse-Homburg"], ["Frederick I, Landgrave of Hesse-Homburg", "date of death", "9 May 1638"]]
answer: 9 May 1638