Question: What date was the end of the battle named after the city where Maria Nowakowska was born?

full_context: Document 1: Maria Nowakowska: Maria Nowakowska (born 14 March 1987) is a student from Legnica, Poland who was crowned Miss Polonia 2009. She was Poland's representative at Miss Universe 2010.
Document 2: Battle of Liegnitz (1760): The armies collided around the town of Liegnitz (now Legnica, Poland) in Lower Silesia. Laudon's Austrian cavalry attacked the Prussian position in the early morning but were beaten back by General Zieten's Hussars. An artillery duel emerged which was eventually won for the Prussians when a grenade hit an Austrian powder wagon. The Austrian infantry then proceeded to attack the Prussian line, but was met with concentrated artillery fire. A Prussian infantry counter-attack led by the Regiment Anhalt-Bernburg on the left forced the Austrians into retreat. Notably, the Anhalt-Bernburgers charged Austrian cavalry with bayonets, a rare example of infantry assaulting cavalry.
Document 3: Tomasz Piotr Nowak: Tomasz Piotr Nowak (born December 22, 1956 in Kwidzyn) is a Polish politician. He was elected to the Sejm on September 25, 2005 getting 9559 votes in 37 Konin district, candidating from the Civic Platform list.
Document 4: Tina Zajc: Tina Zajc (born 1983 in Ljubljana) won the Slovenia national beauty contest, Miss Slovenia 2003, in 2003 and attended the Miss World 2003 competition. At the time, she was a 19-year-old geology student, studying earthquakes and volcanos. She also had a modelling and acting career, and had recorded a song. As the winner of Miss Slovenia 2003, she won a Peugeot 206 car, a ring, a set of Samsonite suitcases, and an all-expense trip to the Miss World competition held in China in December 2003. She liked crime novels, horror films and comedy, and spoke English and German, and Croat.
Document 5: Johanna Lasic: Johanna Mariel Lasić (born 1986) is a beauty pageant titleholder from Argentina. She was crowned Miss Argentina Universe on May 23, 2009 by Dayana Mendoza, who was Miss Universe 2008. Johanna represented Argentina at the Miss Universe 2009 pageant held on August 23, 2009 in Nassau, Bahamas but failed to make it as a semifinalist.
Document 6: Maria Kaczyńska: Maria Helena Kaczyńska (; ; 21 August 1942 – 10 April 2010) was the First Lady of Poland from 2005 to 2010 as the wife of President Lech Kaczyński.
Document 7: Warsaw: Their local rivals, Polonia Warsaw, have significantly fewer supporters, yet they managed to win Ekstraklasa Championship in 2000. They also won the country’s championship in 1946, and won the cup twice as well. Polonia's home venue is located at Konwiktorska Street, a ten-minute walk north from the Old Town. Polonia was relegated from the country's top flight in 2013 because of their disastrous financial situation. They are now playing in the 4th league (5th tier in Poland) -the bottom professional league in the National – Polish Football Association (PZPN) structure.
Document 8: Battle of Grunwald: The Battle of Grunwald, First Battle of Tannenberg or Battle of Žalgiris was fought on 15 July 1410 during the Polish–Lithuanian–Teutonic War. The alliance of the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania, led respectively by King Władysław II Jagiełło (Jogaila) and Grand Duke Vytautas, decisively defeated the German–Prussian Teutonic Knights, led by Grand Master Ulrich von Jungingen. Most of the Teutonic Knights' leadership were killed or taken prisoner. Although defeated, the Teutonic Knights withstood the siege of their fortress in Marienburg (Malbork) and suffered minimal territorial losses at the Peace of Thorn (1411) (Toruń), with other territorial disputes continuing until the Peace of Melno in 1422. The knights, however, would never recover their former power, and the financial burden of war reparations caused internal conflicts and an economic downturn in the lands under their control. The battle shifted the balance of power in Central and Eastern Europe and marked the rise of the Polish–Lithuanian union as the dominant political and military force in the region.
Document 9: Battle of Zhongdu: The Battle of Zhongdu (present-day Beijing) was a battle in 1215 between the Mongols and the Jurchen Jin dynasty, which controlled northern China. The Mongols won and continued their conquest of China.
Document 10: Battle on the Marchfeld: The Battle on the Marchfeld ("i.e. Morava Field"; ; ) at Dürnkrut and Jedenspeigen took place on 26 August 1278 and was a decisive event for the history of Central Europe for the following centuries. The opponents were a Bohemian (Czech) army led by the Přemyslid king Ottokar II of Bohemia and the German army under the German king Rudolph I of Habsburg in alliance with King Ladislaus IV of Hungary. With 15,300 mounted troops, it was one of the largest cavalry battles in Central Europe during the Middle Ages. The Hungarian cavalry played a significant role in the outcome of the battle.
Document 11: Maria Kwaśniewska: She competed for Poland in the 1936 Summer Olympics held in Berlin, Germany, where she won the bronze medal in the Javelin throw.
Document 12: Battle of Mohi: The Battle of Mohi (today Muhi), also known as Battle of the Sajó River or Battle of the Tisza River (11 April 1241), was the main battle between the Mongol Empire and the Kingdom of Hungary during the Mongol invasion of Europe. It took place at Muhi, southwest of the Sajó River. After the invasion, Hungary lay in ruins. Nearly half of the inhabited places had been destroyed by the invading armies. Around 15–25 percent of the population was lost, mostly in lowland areas, especially in the Great Hungarian Plain, the southern reaches of the Hungarian plain in the area now called the Banat and in southern Transylvania.
Document 13: Mongol invasion of Kievan Rus': In mid-1238, Batu Khan devastated the Crimea and pacified Mordovia. In the winter of 1239, he sacked Chernigov and Pereyaslav. After many days of siege, the horde stormed Kiev in December 1240. Despite the resistance of Danylo of Halych, Batu Khan managed to take two of his principal cities, Halych and Volodymyr - Volynskyi. The Mongols then resolved to ``reach the ultimate sea '', where they could proceed no further, and invaded Hungary and Poland.
Document 14: King Jagiello Monument: The King Jagiełło Monument is an equestrian monument of Władysław II Jagiełło, King of Poland and Grand Duke of Lithuania, located in Central Park, New York City. The monument commemorates the Battle of Grunwald, a decisive defeat of the Teutonic Order in 1410. Originally made for the Polish 1939 New York World's Fair pavilion, the monument was permanently installed in Central Park in 1945. Raised on its grand plinth it is one of the most prominently-sited and impressive of twenty-nine sculptures located in the park.
Document 15: Battle of Legnica: The Battle of Legnica (), also known as the Battle of Liegnitz () or Battle of Wahlstatt (), was a battle between the Mongol Empire and the combined defending forces of European fighters that took place at Legnickie Pole ("Wahlstatt") near the city of Legnica in the Duchy of Silesia on 9 April 1241.
ground_truth: 9 April 1241
sub_queries: Maria Nowakowska >> place of birth Answer: Legnica
On what date did Battle of Legnica end? Answer: 9 April 1241