Utilize the input text as a context reference, choose the right relationship between Syriza and Athens 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.

The deadline for the bailout programme too expired as the Syriza government rejected the proposal set by IMF and EU, leaving Athens to seek a third support package as its banks and stock markets remain closed.

Answer: headquarters_location