Question: What city that was a leading member of the Hanseatic League is an independent city in North Rhine-Westphalia?

Context paragraphs:
Bärbel Beuermann: Bärbel Beuermann (born 16 September 1955) is a German politician (The Left, now SPD), and was a member of the Landtag of North Rhine-Westphalia as a list MP since the state election held on 9 May 2010.  She is the joint leader of the party in the Landtag, and is also a member of The Left's national party executive.  After the election of 2012 in North Rhine-Westphalia she retired from the Landtag of North Rhine-Westphalia.

Helmut Brandt: Helmut Brandt (born 24 October 1950 in Bardenberg, Würselen, North Rhine-Westphalia) is a German politician, member of the CDU, and Legal Counsel ("Justiziar") for the CDU/CSU Parliamentary Group.  He has been a member of the Bundestag since 28 June 2005, when he replaced Karl-Josef Laumann, who had been appointed a minister in North Rhine-Westphalia.  Brandt, a lawyer by training specialising in criminal law, was mayor of Alsdorf in North Rhine-Westphalia from 1994 to 1999, having been a councillor there since 1978.

Conrad von Soest: Conrad von Soest, also "Konrad" in modern texts, or in Middle High German "Conrad van Sost" or "von Soyst", (born around 1370 in Dortmund; died soon after 1422) was the most significant Westphalian artist and painted in the so-called "soft style" of International Gothic.  He played a leading role in the introduction of this International Courtly Style to Northern Germany around 1390 and influenced German and Northern European painting into the late 15th century.  He was the master of a thriving workshop and was accepted into the social circle of the cosmopolitan patrician elite of Dortmund.  Dortmund was then a leading and very prosperous member of the influential Hanseatic League.

Oberliga Westfalen: The Oberliga Westfalen is the highest level football league in the region of Westphalia, which is part of the state of North Rhine-Westphalia.  The league existed from 1978 to 2008, but was then replaced by the NRW-Liga, a new statewide league.  With the reform of the league system in 2012, which reduced the Regionalliga West to clubs from North Rhine-Westphalia only and disbanded the NRW-Liga below it, the Oberliga Westfalen was reintroduced as the highest tier in the region and the fifth level overall in Germany.  It is one of fourteen Oberligas in German football, the fifth tier of the German football league system.

Hanseatic Days of New Time: The Hanseatic Days of New Time or the Hansa Days of New Time (German: "Hansetage der Neuzeit" ) is an annual international festival of member cities of the Hanseatic League of New Time (also known as the New Hansa).

Dortmund: Dortmund (] ; Low German: "Düörpm" [ˈdyːœɐ̯pm̩] ; Latin: "Tremonia" ) is an independent city in North Rhine-Westphalia, Germany.  It is in the middle part of the state and is considered to be the administrative, commercial and cultural centre of the eastern Ruhr area.  Its population of 581,612 (2015) makes it the 8th largest city in Germany.  Moreover, Dortmund is the largest city by area and population in the Ruhr Area, an urban area with some 5.1 million (2011) inhabitants which is the largest urban agglomeration in Germany.

Lüneburg: Lüneburg (officially the "Hanseatic Town of Lüneburg", German: "Hansestadt Lüneburg", ] , Low German "Lümborg", Latin "Luneburgum" or "Lunaburgum", Old High German "Luneburc", Old Saxon "Hliuni", Polabian "Glain"), also called Lunenburg in English, is a town in the German state of Lower Saxony.  It is located about 50 km southeast of another Hanseatic city, Hamburg.  It is part of the Hamburg Metropolitan Region.  The capital of the district of Lüneburg, its population is around 72,000 people.  Lüneburg's urban area, which includes the surrounding communities like Adendorf, Bardowick, Bleckede, Amelinghausen and Reppenstedt, has a population of around 103,000.  Lüneburg has been allowed to use the title "Hansestadt" ("Hanseatic Town") in its name since 2007, in recognition of its membership in the former Hanseatic League.  Lüneburg is also a university town.

Weser: The Weser (] ) is a river in Northwestern Germany.  Formed at Hannoversch Münden by the confluence of the rivers Fulda and Werra, it flows through Lower Saxony, then reaching the Hanseatic city of Bremen (see: Hanseatic League), before emptying 50 km further north at Bremerhaven into the North Sea.  On the opposite (west) bank is the town of Nordenham at the foot of the Butjadingen Peninsula; thus, the mouth of the river is in Lower Saxony.  The Weser has an overall length of 452 km .  Together with its Werra tributary, which originates in Thuringia, its length is 744 km .

Dano-Hanseatic War (1426–35): The Dano-Hanseatic War from 1426–1435 (as was the "Kalmar War with the Hanseatic League") was an armed trade conflict between the Danish dominated Kalmar Union (Denmark, Norway, Sweden) and the German Hanseatic League (Hansa) led by the Free City of Lübeck.

Sundern-Allendorf: Allendorf is a part of the town of Sundern in North Rhine-Westphalia.  It used to be in the Hanseatic League.  Allendorf has about 1678 residents, and it is at 320 meters above sea level.  It is south of the municipality, to the south of Langscheid, not far from the town of Plettenberg, between Selbecke and a reservoir.

Supporting paragraphs: Conrad von Soest Dortmund
Answer: Dortmund