Utilize the input text as a context reference, choose the right relationship between Mobily and Saudi Arabia from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Abu Dhabi inched up 0.1 percent, although heavyweight telecommunications firm Etisalat fell 1.4 percent after posting a 40-percent drop in second-quarter profit, citing its Saudi Arabia affiliate Mobily and currency losses.

Answer: headquarters_location