Question: Which is a capital city, Meixian District or Yinchuan?

full_context: Document 1: Lingwu: Lingwu () is the most important industrial city of the Ningxia Hui Autonomous Region, in the northwestern region of the People's Republic of China. It is under the jurisdiction of Yinchuan, the Region's capital city.
Document 2: Yuexiu District: Yuexiu District is a district in Guangzhou, Guangdong, China, located west of the Tianhe District and east of the Liwan District. It is the commercial, political and cultural centre of Guangdong and noted for its high quality education. The Guangdong provincial government and the Guangzhou city government are both located in the Yuexiu District. Established in 1960, the district absorbed the former Dongshan District in May 2005 along with several former subdistricts of the Baiyun and Tianhe district
Document 3: Xingning, Guangdong: Xingning (postal: Hingning; ) is a county-level city, under the jurisdiction of Meizhou City, Guangdong Province, China. The second largest city in east Guangdong, Xingning has an area of 2105 km2 and a population of 1.13 million.
Document 4: Meixian District: Meixian (), formerly Meihsien, is a district of Meizhou City, in northeastern Guangdong Province, China.
Document 5: Yinchuan: Yinchuan is the capital of the Ningxia Hui Autonomous Region, China, and historically it was the former capital of the Western Xia Empire of the Tanguts. It has an area of 4467 sqkm and a total population of 1.99 million. Its built up area is home to 1,290,170 inhabitants spread on three urban districts. The name of the city literally means "silver river".
Document 6: Qingtongxia: Qingtongxia () literally, "Bronze Gorge" is a city in the province of Ningxia in the north of China. Administratively, Qingtongxia is a county-level city within the prefecture-level city of Wuzhong. It is located on the left (northwestern) bank of the Yellow River, opposite and a bit upstream of Wuzhong main urban area.
Document 7: Mei Ze: Mei Ze (; fl. 4th century), also known as Mei Yi (梅頤), was a Confucian scholar and government official of the Eastern Jin Dynasty of ancient China. A native of Runan (汝南, present-day Wuchang District, Hubei province), Mei Ze served as governor of Yuzhang Prefecture (豫章, present-day Nanchang, Jiangxi province). After the establishment of the Eastern Jin, he presented a purported copy of Kong Anguo's lost compilation of the Old Text "Shangshu" ("Book of Documents") to the emperor, which became officially recognized as a Confucian classic for over a millennium. However, Mei Ze's version of the "Shangshu" has been proven a forgery.
Document 8: Meizhou: Meizhou is a prefecture-level city in eastern Guangdong province, China. It has an area of 15864.51 km² , and a population of 4.33 million at the 2010 census. It comprises Meijiang District, Meixian District, Xingning City and five counties. Its built-up or metro area made up of two districts was home to 935,516 inhabitants at the 2010 census.
Document 9: Tianxin, Longchuan: Tianxin is a small town of Longchuan County, Heyuan City, Guangdong Province, China. It is located in east-central part of Longchuan County, upstream of the Han River, with Xingning Town and Huilong Town to its east, Shikeng Town and Tiechang Town to its south, and Chiguang Town to its north. Tianxin was set up as a district in November 1983, and a town in 1990 to now. It has higher topography in the northeast and lower in the southwest, with a chain of undulating hills.
Document 10: Western Xia mausoleums: Occupying an area of some 50 km2 , the Western Xia mausoleums at the foot of the Helan Mountains in the Ningxia Hui Autonomous Region of northwestern China includes nine imperial mausoleums and 250 tombs of imperial relatives and officials. This burial complex lies some 40 km westward from capital city of the Western Xia, the Xingqing fu or Xingqing, what is modern-day Yinchuan, capital of Ningxia Hui Autonomous Region.
Document 11: Songyuan, Guangdong: Songyuan () is a town in the Meixian District of Meizhou City, northeastern Guangdong Province, China, along the border with Fujian Province to the northeast. It has a population of about 42,000 residing in an area of 149.5 km2 .
Document 12: Shaanxi: Shaanxi () is a province of the People's Republic of China. Officially part of the Northwest China region, it lies in central China, bordering the provinces of Shanxi (NE, E), Henan (E), Hubei (SE), Chongqing (S), Sichuan (SW), Gansu (W), Ningxia (NW), and Inner Mongolia (N). It covers an area of over 205,000 sqkm with about 37 million people. Xi'an—which includes the sites of the former Chinese capitals Fenghao and Chang'an—is the provincial capital. Xianyang, which served as the Qin capital, is located nearby. The other prefecture-level cities into which the province is divided are Ankang, Baoji, Hanzhong, Shangluo, Tongchuan, Weinan, Yan'an and Yulin.
Document 13: Mehsi: Mehsi is a small town located in East Champaran district of Bihar state, India. Mehsi is an entry point of East Champaran when traveling from Patna, Muzaffarpur to Raxaul, connected both by railway and roadway. There are many button factories, a small scale industry, although most of the people depend upon agriculture and commerce.
Document 14: Yinchuan Hedong International Airport: Yinchuan Hedong International Airport (IATA: INC, ICAO: ZLIC) is the primary airport serving Yinchuan, the capital of Ningxia Hui Autonomous Region, People's Republic of China. It is located 25 km southeast of downtown Yinchuan in the town of Linghe of Lingwu City. A relatively small airport compared to many airports in China, it nevertheless is the autonomous region's main aviation gateway. Its name "Hedong" literally means "East of the River" and derives from the airport's location east of the Yellow River. It is connected to over 20 cities by either direct flights, or transferring in Xi'an and Beijing. The terminal building covers a total area of 15,000 m2 . In 2013, the airport handled 4,247,843 passengers, making it the 39th-busiest airport in China.
Document 15: Wuzhong, Ningxia: Wuzhong () is a prefecture-level city in the Ningxia autonomous region of the People's Republic of China. It was known as Yinnan Prefecture () before it was upgraded to a prefecture-level city in 1998. In 2010, Wuzhong had a population of 1.3 million.
ground_truth: Yinchuan