Utilize the input text as a context reference, choose the right relationship between Qatar Airways and Doha 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.

Qatar Airways has again been linked with a move to invest in India's SpiceJet, more than two years after the Doha carrier's CEO rejected claims he was interested in buying a stake.

Answer: headquarters_location