Question: What historical regions does the city where MA'ADEN's corporate headquarters are located belong to?
Context: The Rohm and Haas Corporate Headquarters in Philadelphia, Pennsylvania, United States was built as the headquarters for the former chemical manufacturing company Rohm and Haas.  Completed in 1964, the building was the first private investment for the urban renewal of the Independence Mall area.  Only two blocks from Independence Hall the building, designed by Pietro Belluschi and George M. Ewing Co., was lauded for its respect to the nearby park and historical buildings.  Philadelphia's city planners praised the Rohm and Haas Corporate Headquarters as a standard for all redevelopment buildings. 77 West Wacker Drive, previously the United Building, is an office building in the Loop, Chicago.  Finished in 1992, the building rises to a height of 668 ft (204 m) with around 944000 sqft of interior space.  The building, with 50 floors, was designed by Ricardo Bofill.  It was formerly known as the RR Donnelley Building when the RR Donnelley printing company was the primary tenant.  RR Donnelley moved its corporate headquarters to a different location in May 2005, and in 2007 the building became the corporate headquarters of United Airlines.  The deal included naming rights to the building. Aden ( , ; Arabic: عدن‎ ‎ "ʻAdin/ʻAdan  " ] ) is a port city in Yemen, located by the eastern approach to the Red Sea (the Gulf of Aden), some 170 km east of Bab-el-Mandeb.  Its population is approximately 800,000 people.  Aden's ancient, natural harbour lies in the crater of a dormant volcano which now forms a peninsula, joined to the mainland by a low isthmus.  This harbour, Front Bay, was first used by the ancient Kingdom of Awsan between the 5th and 7th centuries BC.  The modern harbour is on the other side of the peninsula.  Aden gives its name to the Gulf of Aden. 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. 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. The Gulf of Aden (Arabic: خليج عدن‎ ‎ "Ḫalīǧ ʻAdan ", Somali: "Gacanka Cadmeed" ) is a gulf located in the Arabian Sea between Yemen, on the south coast of the Arabian Peninsula, and Somalia in the Horn of Africa.  In the northwest, it connects with the Red Sea through the Bab-el-Mandeb strait, which is more than 20 mi wide.  It shares its name with the port city of Aden in Yemen, which forms the northern shore of the gulf.  Historically, the Gulf of Aden was known as "The Gulf of Berbera", named after the ancient Somali port city of Berbera on the south side of the gulf.  However, as the city of Aden grew during the colonial era, the name of "Gulf of Aden" was popularised. Superior Bancorp, and its principal subsidiary Superior Bank, was a southeastern community thrift with approximately $3.2 billion in assets in 2010.  The company was publicly held and had its corporate headquarters in Birmingham, Alabama.  Superior was founded in 1997 as The Banc Corporation.  Before its demise, the company stood as the second-largest community bank holding company in Alabama, behind Regions Financial Corporation, and third largest when including foreign-based, but locally headquartered, BBVA Compass.  The company's corporate headquarters were located in the historic John A. Hand Building on 20th Street North in downtown Birmingham, which is named after former AmSouth Bancorporation president John A. Hand.  Superior Bank had 73 branch locations including 38 in Alabama and 22 in Florida.  Superior Bank was closed by FDIC on April 15, 2011.  The bank's branches and its assets were acquired by a newly created subsidiary of Community Bancorp, operating as Superior Bank N.A. Corporate headquarters is the part of a corporate structure that deals with important tasks such as strategic planning, corporate communications, taxes, law, marketing, finance, human resources, and information technology.  Corporate headquarters takes responsibility for the overall success of the corporation and ensures corporate governance.  It is sometimes referred to as the head office, which is the location where the executives of a business work and where many of the key business decisions are made.  Generally, corporate headquarters acts as a core when the business is operating.  The corporate headquarters includes: the CEO (chief executive officer) as a key person and their support staff such as the CEO office and other CEO related functions; the "corporate policy making" functions: Include all corporate functions necessary to steer the firm by defining and establishing corporate policies; the corporate services: Activities that combine or consolidate certain enterprise-wide needed support services, provided based on specialized knowledge, best practices, and technology to serve internal (and sometimes external) customers and business partners; the interface: Reporting line and bi-directional link between corporate headquarters and business units.  Most other divisions and branches report to the corporate headquarters and staff may visit there periodically for training or other instructions" (Kimberly: 2014: 22).  The corporate services are often relocated into a separate legal entity called shared services center.  Research shows that the city in which a company is headquartered has a significant influence on the company's activities, including its business practices and its corporate philanthropic giving. For many years the Spanish monarchy and the dictatorships which followed—Primo de Rivera and Franco—maintained the position that Spain was a unified nation, the legacy of the Roman province, Hispania.  In reality, Spain (formerly known as the Spains) is and has long been a cluster of different territories with their own systems.  Currently, Spain is divided into eighteen autonomous entities, which are themselves composed of fifty provinces.  Seven of those eighteen autonomous entities are officially designated as "nationalities", while the rest are defined as regions, historical regions, communities and historical communities.  There are many proponents of this confederacy, however it does carry certain historical problems.  Just as neither modern nor historical Spain were a single unit, the modern divisions also do not really work in the past.  Nonetheless, modern Spain is more easily understood when one first understands the differences which underlie its current divisions. The Alabama Power Headquarters Building is an 18 story (98 m), corporate headquarters building located in Birmingham, Alabama.  The building, completed in 1990, is part of the Alabama Power Headquarters Complex which is composed of four office buildings, two parking desks, and two parking lots.  The four buildings contain an estimated 1200000 sqft and house over 5,000 employees.  The Alabama Power Headquarters Complex is one of several corporate buildings Southern Company has in the Birmingham area, the others being in the Inverness and Lakeshore area.  Alabama Power also operates several retail business offices throughout the state, more than 60 different storerooms across six geographical divisions, and a large complex in northern Calera, Alabama.
Answer: Najd and Al-Yamama