In the context of the input sentence, determine the relationship between 'Turkmenistan' and 'ASHGABAT'.
Options: subsidiary, headquarters location, developer, employer

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.
headquarters location