Question: What is the capitol of the district that Yapei is a part of? 

full_context: Document 1: Sekyere Central District: The Sekyere Central District is one of the twenty-seven (27) districts in the Ashanti Region of Ghana. Its capital is Nsuta. The district is among the new districts and municipalities created in 2008 by the then President, John Kufuor.
Document 2: Central Gonja District: The Central Gonja District is one of the twenty (20) districts in the Northern Region of north Ghana. The capital is Buipe.
Document 3: Chogu-Yapalsi: Choggu-Yapalsi is a community in Sagnarigu District in the Northern Region of Ghana. It is a nucleated but populated community located along the Tamale-Kumbungu road having Jisonaayili, Gurugu and Choggu Mmanaayili as its immediate neighbors.
Document 4: North Tongu District: The North Tongu District is one of the twenty-five (25) districts in the Volta Region. North Tongu district capital and administrative centre is Battor Dugame.
Document 5: Kpandai District: The Kpandai District is one of the twenty (20) districts in the Northern Region of north Ghana. The capital is Kpandai. Kpandai district was created in 2008.
Document 6: Abetifi: Abetifi is a small town in south Ghana and is the capital of Kwahu East district, a district in the Eastern Region of south Ghana.
Document 7: Sagnarigu District: Sagnarigu District is one of the twenty six (26) districts in the Northern Region of Ghana. Carved from the Tamale Metropolitan District, Sagnarigu District was created in 2012. Its capital is Sagnarigu.
Document 8: Birim Central Municipal District: The Birim Central Municipal District is one of the twenty-one (21) districts of the Eastern Region of south Ghana. Its capital is Akim Oda. The Birim Central Municipal district was one of the new districts created in 2008 in Ghana.
Document 9: Yongduuni: Yongduuni is a community in Tamale Metropolitan District in the Northern Region of Ghana. It is a less populated community. The inhabitants of the community are predominantly farmers and the women are also into Shea butter production.
Document 10: Yapei: Yapei or Bupei is a small town in the Central Gonja District, a district in the Northern Region of north Ghana.
Document 11: Ga Central District: The Ga Central Municipal Assembly is one of the ten districts in the Greater Accra Region of Ghana. The District was carved from the then Ga South Municipal Assembly and inaugurated on 28 June 2012. The Assembly was established by Legislative Instrument 2135 with the capital at Sowutuom.
Document 12: Konkomba people: The Konkomba people are a Gur ethnic group residing mainly in the Northern, Brong Ahafo, Volta, Eastern and Greater Accra Regions of Ghana. Saboba, Chereponi and Nanumba Districts, Gushiegu and Karaga districts, Zabzugu and Tatale-Sanguli districts in the Northern Region and the Nkwanta North and South Districts in the Volta Region are a few examples of administrative districts where Bikpakpaam are seen in huge populations. Other key towns of Bikpakpaam in Ghana are Atebubu, Kintampo, Techiman and Yeji in the Brong Ahafo Region. According to the Act 280 of the Anatomy act of Ghana, the Konkomba people (known as Bikpakpaam) are the second largest ethnic group in the Northern Region of Ghana. The 2010 census data indicates that Bikpakpaam in Ghana number 823,000 and applying the intercensal growth rate would give a population of more than one million now. CIA The World Factbook reports in Demographics of Ghana that Konkomba people are the 8th largest Ethnic group in Ghana representing 3.5% of the Total population of Ghana. Saboba (Chabob) in the Northern Region of Ghana is the capital town of all Bikpakpaam in Ghana. Bikpakpaam are also found in the republic of Togo, a sister West African country to Ghana. In Togo Bikpakpaam reside mainly in the Kara, Central and Plateaux Regions. Guerin Kouka (a.k.a. Nanguem Do, the capital of Dankpen district) in the Kara Region is the capital town of Bikpakpaam in Togo. Dankpen district is located in the north western corridor of Togo. In Schwartz's (2005) account, Bikpakpaam number about 50,100 in Togo. The 2011 census in Togo indicates however that the total population of Bikpakpaam in Dankpen district alone was 122,209. Visit Konkomba language for more information. Konkomba people speak Konkomba language a.k.a Likpakpaln. The traditional dance of Konkomba people is Kinachunŋ (pronounced k-i-naa-chung). All Konkomba settlements are led by a traditional chief called Ubor. In Bikpakpaam dominant areas, the people have instituted or established their own chieftains who serve as overlords of the settlements. For instance, the Saboba area has the Uchabob-bor as the overlord. Bikpakpaam strongly believe in solidarity, determination and hard-work. Until the turn of the 21st century, their primary occupation was farming and animal husbandry. In occupational terms, Bikpakpaam are mainly subsistence farmers and rearers of animals such as poultry, small ruminants and cattle. This, probably, explains their scattered settlement across the West African sub-region. Indeed, Maasole intimates that Bikpakpaam have always been on the move, in search for fertile farmlands. Most Konkombas are actively in education today and a recent research projects that Konkombas will become a dominant force in politics, health, education and the civil society by 2025.
Document 13: Pepease: Pepease is a village in the Kwahu East district, a district in the Eastern Region of south Ghana.
Document 14: Fiapre: Fiapre is a town in Sunyani West District in the Brong-Ahafo Region of Ghana. Fiapre is very close to the regional capital town of the Brong-Ahafo Region, Sunyani.
Document 15: Yeji: Yeji is a town in south Ghana and is the capital of Pru District of the Brong-Ahafo Region in Ghana. Yeji is in the north-east of Brong-Ahafo Region, and is adjacent to Lake Volta. Yeji is connected by highway to Ejura and Kwadjokrom. It had a population of 29,515 at the census of 2010.
ground_truth: Buipe