Question: What historical regions does the city where MA'ADEN's corporate headquarters are located belong to?

full_context: Document 1: Mining in Mauritania: Mauritania's mineral sector was dominated by iron ore mining and beneficiation. Other mineral commodities produced in the country included cement, copper, gold, gypsum, petroleum, salt, and steel. The Ministère des Mines et de l’Industrie was the Government agency responsible for enacting the Mining Code and for the coordination of all activities in the mining sector. The Direction des Mines et de la Géologie was the entity responsible for promoting the mineral sector and for providing geologic and mining information to potential investors; the Direction des Hydrocarbures was in charge of the development of the petroleum sector; and the Office Mauritanien des Recherches Géologiques was the Government entity responsible for evaluating areas of mineral potential for exploration. Société Nationale Industrielle et Minière (SNIM) was responsible for iron ore production and benefciation.
Document 2: Kingdom Holding Company: The Kingdom Holding Company (Arabic: شركة المملكة القابضة‎ ‎ ) is a Saudi conglomerate holding company based in Riyadh. The Kingdom Holding Company (KHC) is a publicly listed company on the Tadawul (Saudi Stock Exchange). The KHC consists of a select team of experienced investment specialists directed by its founder and chairman, HRH Prince Alwaleed bin Talal and Chief Executive Officer, Eng. Talal Ibrahim Al Maiman. The company describes itself as a diversified investment company, whose main interests are financial services, real estate, tourism and hospitality, media, entertainment, petrochemicals, aviation and technology.
Document 3: Odisha Mining Corporation: Odisha Mining Corporation Limited or OMC is a Gold Category Public Sector Undertaking (PSU) established on 16 May 1956 as a joint venture company between Government of Odisha and Government of India to explore and harness mineral wealth of the Odisha and make value addition. Odisha Mining Corporation is managed by a Board of Directors consisting of Government Directors and Independent Directors. The day-to-day management of the corporation is looked after by the Chairman and the Managing Director as authorized by the Board of Directors.
Document 4: Riyadh: Riyadh (/rɨˈjɑːd/; Arabic: الرياض‎ ‎ "ar-Riyāḍ" ] ) is the capital and most populous city of Saudi Arabia. It is also the capital of Riyadh Province and belongs to the historical regions of Najd and Al-Yamama. It is situated in the center of the Arabian Peninsula on a large plateau and home to more than six million people.
Document 5: Jordan: Jordan ( ; Arabic: الأردن‎ ‎ "Al-Urdunn "), officially The Hashemite Kingdom of Jordan (Arabic: المملكة الأردنية الهاشمية‎ ‎ "Al-Mamlakah Al-Urdunnīyah Al-Ḥāshimīyah "), is an Arab kingdom in Western Asia, on the East Bank of the Jordan River. Jordan is bordered by Saudi Arabia to the east and south; Iraq to the north-east; Syria to the north; Israel, Palestine and the Dead Sea to the west; and the Red Sea in its extreme south-west. Jordan is strategically located at the crossroads of Asia, Africa and Europe. The capital, Amman, is Jordan's most populous city as well as the country's economic, political and cultural centre.
Document 6: Zhongjin Gold: Zhongjin Gold is a Chinese mining corporation mainly focusing on non-ferrous metals, such as gold, copper, and platinum. They are China's largest gold producer. The corporation is based in Beijing, and holds mines in across China. They recently acquired two large gold production companies in Shandong, after winning a bidding war against Shandong Gold. The company's largest single gold mine in the Dazhuohan mine, producing 500,000 metric tones concentrate a year. They are currently traded on the Shanghai Stock Exchange as "Company 600489", and are listed on Forbes "Asian Fab 50" list. As they are generally considered China's most powerful gold corporation, they often do business with many foreign companies and entities.
Document 7: Thompson Creek Metals: Thompson Creek Metals Company Inc. is a full cycle mining company with acquisition, exploration, development, and operation in North America.</small> The corporate office is located in Denver, Colorado. The company primarily produces copper, gold, and molybdenum.</small> In the past several years, the Company has evolved from being a major primary molybdenum producer to becoming a copper and gold mining company with the construction and development of the Mount Milligan (open-pit copper-gold) mine and concentrator in British Columbia, Canada. Mount Milligan is Thompson Creek Metals principal operation and the company owns 100% of this property.</small> The company also owns 100% of its Thompson Creek Mine (open-pit molybdenum and concentrator) in Idaho. Thompson Creek Metals owns 75% joint venture interest in two other properties, including its Endako Mine (open-pit molybdenum, concentrator and roaster) in British Columbia, and its Langeloth Metallurgical Facility (roaster) in Pennsylvania.</small> Thompson Creek Metals has additional development projects, including the Berg property in British Columbia (exploration of copper, molybdenum, and silver).</small> </small>
Document 8: Geography of Saudi Arabia: The Kingdom of Saudi Arabia is a country situated in Southwest Asia, the largest country of Arabia, bordering the Persian Gulf and the Red Sea, north of Yemen. Its extensive coastlines on the Persian Gulf and Red Sea provide great leverage on shipping (especially crude oil) through the Persian Gulf and Suez Canal. The kingdom occupies 80% of the Arabian Peninsula. Most of the country's boundaries with the United Arab Emirates (UAE), Oman, and the Republic of Yemen (formerly two separate countries: the Yemen Arab Republic or North Yemen; and the People's Democratic Republic of Yemen or South Yemen) are undefined, so the exact size of the country remains unknown. The Saudi government estimate is at 2,217,949 square kilometres, while other reputable estimates vary between 2,149,690 and 2,240,000 sq. kilometres. Less than 1% of the total area is suitable for cultivation, and in the early 1990s, population distribution varied greatly among the towns of the eastern and western coastal areas, the densely populated interior oases, and the vast, almost empty deserts.
Document 9: Saudis: Saudis (Arabic: سعوديون‎ ‎ "Suʿūdiyyūn"), or Saudi Arabians are a nation; comprised mainly of the different regional Arabic ethnic groups including Hejazis, Najdis, Hassawis, Southern Arabs and others, who are mostly native to the Arabian Peninsula and share a common general Saudi culture and a Saudi nationality. Saudis speak one of the accents and dialects of the Peninsular Arabic, including the Hejazi, Najdi, Gulf and Southern Arabic dialects (which includes Bareqi), as a mother tongue. According to the 2010 census, Saudi Nationals represented approximately 19,335,377 making up 74.1% of the total population. Saudi Arabia is a state governed by absolute monarchy, with the king as its head of state.
Document 10: Maaden (company): MA'ADEN (Saudi Arabian Mining Co.) is a diversified mining company, active in gold base metals mining and infrastructure industry. Ma'aden was formed as a Saudi joint stock company on 23 March 1997 for the purpose of facilitating the development of Saudi Arabia’s mineral resources. It is the largest mining company in Saudi Arabia. The Saudi government still owns 50% of its shares while the remaining 50% are listed in Tadawul (Stock Market). The company is structured with corporate headquarters in Riyadh with several subsidiaries.
Document 11: Shanta Gold: Shanta Gold Limited is gold mining company, registered in Guernsey in the Channel Islands but which operates in Tanzania. The company is listed on AIM on the London Stock Exchange (symbol: LON:SHG) and had a market capitalisation of £63.5M as of 18 September 2013. The Tanzanian offices are in Dar Es Salaam. Its bankers are UBS.
Document 12: Cairo: Cairo ( ; Arabic: القاهرة‎ ‎ "al-Qāhirah ", , Coptic: "Kahire ") is the capital and largest city of Egypt. The city's metropolitan area is the largest in the Middle East and the Arab world, and the 15th-largest in the world, and is associated with ancient Egypt, as the famous Giza pyramid complex and the ancient city of Memphis are located in its geographical area. Located near the Nile Delta, modern Cairo was founded in 969 CE by the Fatimid dynasty, but the land composing the present-day city was the site of ancient national capitals whose remnants remain visible in parts of Old Cairo. Cairo has long been a center of the region's political and cultural life, and is titled "the city of a thousand minarets" for its preponderance of Islamic architecture. Cairo is considered a World City with a "Beta +" classification according to GaWC.
Document 13: Saudi Arabia: Saudi Arabia ( , ), officially the Kingdom of Saudi Arabia (KSA), is a sovereign Arab state in Western Asia constituting the bulk of the Arabian Peninsula.
Document 14: Diriyah Governorate: Al-Dir'iyyah Governorate is a governorate ("muhafazah") within Riyadh Region in Saudi Arabia. The governorate is bounded by the Saudi capital city of Riyadh to the south and east, by Dhruma Governorate to the south and west, and by Huraymla Governorate to the north. The governorate is seated in the city of al-Dir'iyyah, the original hometown of the House of Saud, which served as the capital of the Saudi dynasty from 1744 to 1818. The population of the governorate was 60,777 at the time of the 2004 census, including 18,040 non-Saudis. 34,117 live in the city of al-Dir'iyyah itself.
Document 15: Vedanta Resources: Vedanta Resources plc is a global diversified metals and mining company with its headquarters in London, United Kingdom. It is the largest mining and non-ferrous metals company in India and has mining operations in Australia and Zambia and oil and gas operations in three countries. Its main products are copper, zinc, aluminium, lead, iron ore and petroleum. It is also developing commercial power stations in India in Odisha (2,400 MW) and Punjab (1,980 MW). The company is principally owned by Indian billionaire Anil Agarwal through Volcan Investments, a holding vehicle with a 61.7% stake in the business.
ground_truth: Najd and Al-Yamama