Question: What district shares border with the city encompassing K+S's headquarter?

full_context: Document 1: Stellihorn: The Stellihorn is a mountain of the Swiss Pennine Alps, overlooking the lake of Mattmark in the canton of Valais. It lies south of Saas-Almagell in the upper valley of Saas. The north side is covered by a glacier named "Nollen Gletscher".
Document 2: Hanover: Various industrial businesses are located in Hannover. The Volkswagen Commercial Vehicles Transporter (VWN) factory at Hannover-Stöcken is the biggest employer in the region and operates a huge plant at the northern edge of town adjoining the Mittellandkanal and Motorway A2. Jointly with a factory of German tire and automobile parts manufacturer Continental AG, they have a coal-burning power plant. Continental AG, founded in Hanover in 1871, is one of the city's major companies, as is Sennheiser. Since 2008 a take-over is in progress: the Schaeffler Group from Herzogenaurach (Bavaria) holds the majority of the stock but were required due to the financial crisis to deposit the options as securities at banks. TUI AG has its HQ in Hanover. Hanover is home to many insurance companies, many of which operate only in Germany. One major global reinsurance company is Hannover Re, whose headquarters are east of the city centre.
Document 3: Sweden: At 449,964 km2 (173,732 sq mi), Sweden is the 55th-largest country in the world, the 4th-largest country entirely in Europe, and the largest in Northern Europe. The lowest elevation in Sweden is in the bay of Lake Hammarsjön, near Kristianstad, at −2.41 m (−7.91 ft) below sea level. The highest point is Kebnekaise at 2,111 m (6,926 ft) above sea level.
Document 4: Schermützelsee: The Schermützelsee is a lake in Brandenburg, Germany. It is located in the town of Buckow in the district Märkisch-Oderland northwest of Müncheberg and east of the Berlin centre. With its surface area of 1.37 km² it is the largest water in the hill country „Märkische Schweiz“ and in the Märkische Schweiz Nature Park.
Document 5: Alghanim Industries: Alghanim Industries is one of the largest privately owned companies in the Persian Gulf region, predominantly in Kuwait. A multinational company in outlook with operations in 40 countries, Alghanim Industries is a multibillion-dollar conglomerate with more than 30 businesses. They also fund projects and provide loans for non-UAE/Middle East countries. Alghanim Industries claimed that it collected revenues of $2.5 billion in 2009, although has not disclosed its financial standing since.
Document 6: Kharasan mine: The Kharasan mine is a large in-situ leaching mine located in the southern part of Kazakhstan in South Kazakhstan Region. Kharasan represents one of the largest uranium reserves in Kazakhstan having estimated reserves of 59.3 million tonnes of ore grading 0.074% uranium.
Document 7: Kassel: Kassel (; spelled Cassel until 1928) is a city located on the Fulda River in northern Hesse, Germany. It is the administrative seat of the Regierungsbezirk Kassel and the district of the same name and had 200,507 inhabitants in December 2015. The former capital of the state of Hesse-Kassel has many palaces and parks, including the Bergpark Wilhelmshöhe, which is a UNESCO World Heritage Site. Kassel is also known for the "documenta" exhibitions of contemporary art. Kassel has a public university with 25,000 students (2018) and a multicultural population (39% of the citizens in 2017 had a migration background).
Document 8: K+S: K+S AG (formerly" Kali und Salz GmbH") is a German chemical company headquartered in Kassel. The company is Europe’s largest supplier of potash for use in fertilizer and, after the acquisition of Morton Salt, the world's largest salt producer. The firm also produces and distributes other mineral fertilizers, such as those from magnesium and sulphur. K+S is mainly active in Europe, North and South America with more than 14,000 employees worldwide (2014).
Document 9: Kas: Kas is the brand name of soft drink produced by PepsiCo. It is made in grapefruit, orange (yellow), lemon (greenish-yellow), bitter (herbal extracts), and apple flavors. Kasfruit juices are also offered in multiple flavors. Kas is available in Spain, Mexico and France, and was available in Portugal, Brazil and Argentina during the 1990s.
Document 10: Stellbergsee: Stellbergsee is a lake in Söhre, Landkreis Kassel and Schwalm-Eder-Kreis, Hesse, Germany. At an elevation of 356 m, its surface area is 0.014 km².
Document 11: Seeberg: Seeberg is a municipality in the Oberaargau administrative district in the canton of Bern in Switzerland. The lake Burgäschisee is located on the border with Aeschi. On 1 January 2016 the former municipality of Hermiswil merged into Seeberg.
Document 12: Alatsee: Alatsee is a meromictic lake in Ostallgäu, Bavaria, Germany. At an elevation of 868.0 m, its surface area is 12.00 ha. This lake supposedly holds "Hitler's gold". Many divers have died or disappeared mysteriously in this lake due to the toxicity of the organisms living in this lake. These organisms create the "blood cloud " that occurs quite abundantly throughout the year.
Document 13: Wingas: Wingas GmbH is a gas distribution company located in Kassel, Germany. It is a subsidiary of Gazprom, which held its shares through W&G Beteilligungs-GmbH & Co. KG.
Document 14: Hesselberg: Hesselberg (689 m above sea level) is the highest point in Middle Franconia and the Franconian Jura and is situated 60 km south west of Nuremberg, Germany. The mountain stands isolated and far from the center of the Franconian Jura, in its southwestern border region, 4 km to the north west of Wassertrüdingen. The mountain's first recorded name was "Öselberg", which probably derived from "öder Berg" (bleak mountain). This name later changed to "Eselsberg" and finally to the current name "Hesselberg". As a butte the mountain provides an insight into Jurassic geology. It has also witnessed an eventful history, many incidents were handed down from generation to generation and these mixed with facts have become legends. Nowadays many people visit Hesselberg in order to enjoy nature and the wonderful vista. When the weather is clear the Alps 150 km away can be seen.
Document 15: Thuringia: Mining was important in Thuringia since the later Middle Ages, especially within the mining towns of the Thuringian Forest such as Schmalkalden, Suhl and Ilmenau. Following the industrial revolution, the old iron, copper and silver mines declined because the competition from imported metal was too strong. On the other hand, the late 19th century brought new types of mines to Thuringia: the lignite surface mining around Meuselwitz near Altenburg in the east of the Land started in the 1870s, and two potash mining districts were established around 1900. These are the Südharzrevier in the north of the state, between Bischofferode in the west and Roßleben in the east with Sondershausen at its centre, and the Werrarevier on the Hessian border around Vacha and Bad Salzungen in the west. Together, they accounted for a significant part of the world's potash production in the mid-20th century. After the reunification, the Südharzrevier was abandoned, whereas K+S took over the mines in the Werrarevier. Between 1950 and 1990, uranium mining was also important to cover the Soviet Union's need for this metal. The centre was Ronneburg near Gera in eastern Thuringia and the operating company Wismut was under direct Soviet control.
ground_truth: Schwalm-Eder-Kreis
sub_queries: K+S >> headquarters location Answer: Kassel
Kassel >> shares border with Answer: Schwalm-Eder-Kreis