Utilize the input text as a context reference, choose the right relationship between New Democracy 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 Aug 14 Greece's conservative opposition New Democracy party will not back the government in a vote of confidence the prime minister is expected to call after Aug. 20, a senior party lawmaker said on Friday.

Answer: headquarters_location