Utilize the input text as a context reference, choose the right relationship between Kathimerini 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.

ATHENS (Reuters) - Greece is preparing a reform package worth 12 billion euros ($13.33 billion) over two years, more than previously planned, in an effort to offset a return to recession after months of negotiations with creditors, the Greek newspaper Kathimerini reported.

Answer: headquarters_location