question: Who is the spouse of the director of film Streets Of Blood?
context: [["Streets of Blood", ["Streets of Blood is a 2009 direct-to-video action film directed by Charles Winkler and starring Val Kilmer, 50 Cent, Michael Biehn and Sharon Stone.", "It is has a screenplay by Eugene Hess, based on a story by Hess and Dennis Fanning.", "The film was produced by Nu Image/Millennium Films."]], ["Heather D. Gibson", ["Heather Denise Gibson is a Scottish economist currently serving as Director- Advisor to the Bank of Greece( since 2011).", "She is the spouse of Euclid Tsakalotos, former Greek Minister of Finance."]], ["Mehdi Abrishamchi", ["Mehdi Abrishamchi is an Iranian People's Mujahedin of Iran( MEK) politician who has been described as\" the right hand man of Massoud Rajavi\".", "He is the former spouse of the group's current leader, Maryam Rajavi, whom he divorced so that she could become the spouse of Massoud Rajavi."]], ["Charles Winkler", ["Charles Winkler is an American television and film director and producer.", "He is the son of Academy Award-winning producer and director Irwin Winkler and actress Margo Winkler and the husband of Sandra Nelson."]], ["Adib Kheir", ["Adib Kheir was a leading Syrian nationalist of the 1920s.", "He was the owner of the Librairie Universelle in Damascus.", "His granddaughter is the spouse of Manaf Tlass."]], ["Marie-Louise Coidavid", ["Marie Louise Coidavid( 1778 \u2013 March 11, 1851), was the Queen of the Kingdom of Haiti 1811 \u2013 20 as the spouse of Henri I of Haiti."]], ["Princess Auguste of Bavaria (1875\u20131964)", ["Princess Auguste of Bavaria( 28 April 1877 \u2013 25 June 1964) was a member of the Bavarian Royal House of Wittelsbach and the spouse of Archduke Joseph August of Austria."]], ["Sophia Magdalena of Denmark", ["Sophia Magdalena of Denmark (3 July 1746 \u2013 21 August 1813) was Queen of Sweden as the spouse of King Gustav III."]], ["Maria Teresa, Grand Duchess of Luxembourg", ["Maria Teresa, Grand Duchess of Luxembourg( born Mar\u00eda Teresa Mestre y Batista; on 22 March 1956), is the spouse of Grand Duke Henri."]], ["Gertrude of Bavaria", ["Gertrude of Saxony and Bavaria( 1152/55\u20131197) was Duchess of Swabia as the spouse of Duke Frederick IV, and Queen of Denmark as the spouse of King Canute VI."]]]
supporting_facts: [["Streets of Blood", 0], ["Charles Winkler", 1]]
evidences: [["Streets of Blood", "director", "Charles Winkler"], ["Charles Winkler", "spouse", "Sandra Nelson"]]
answer: Sandra Nelson