What historical regions does the city where MA'ADEN's corporate headquarters are located belong to?
Najd and Al-Yamama
Title: Maaden (company)
Passage: 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.
Title: Alabama Power Headquarters Building
Passage: 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.
Title: Riyadh
Passage: 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.
Riyadh Maaden (company)