What is the relationship between Turkmenistan and ASHGABAT in the context of the input sentence. Choose an answer from: 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