Refer to the input text as context and select the correct relationship between 'New Democracy' and 'ATHENS' from the available options.
Options: manufacturer, headquarters location, industry, parent organization

ATHENS (Reuters) - Former Prime Minister Antonis Samaras announced he was stepping down as leader of Greece's conservative New Democracy opposition party after a strong vote for the 'No' position backed by the leftwing government in Sunday's referendum.
headquarters location