Utilize the input text as a context reference, choose the right relationship between Kosmos Energy and DALLAS 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.

CHICAGO -- ADM Donates $325,000 to Promote Clean Waterways Source: Archer Daniels Midland Company TORRANCE, Calif. -- Phenomenex Raises $19,450 for American Red Cross in Soccer Charity Cup Source: Phenomenex, Inc. DALLAS -- Perot Museum of Nature and Science Announces Innovative Kosmos Energy STEM Teacher Institute to Empower Teachers in Science Instruction Source: Kosmos Energy CHICAGO -- Hyatt to Partner with Khan Academy to Bring Open-Source Global Learning to Colleagues and Communities Source: Hyatt

Answer: headquarters_location