Utilize the input text as a context reference, choose the right relationship between Turkmenistan and ASHGABAT 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.

ASHGABAT (Reuters) - The four countries planning a gas pipeline from Turkmenistan to Pakistan and India via Afghanistan will in September pick a company to lead construction, paving the way to the start of work on the project, the Turkmen president said on Saturday.

Answer: headquarters_location