What is the relationship between 'Syriza' and 'Athens' in the context of the input sentence.
Options: position held, distribution format, creator, headquarters location

Nobel prize winning economist Paul Krugman, a vocal supporter of Athens in its long-running bailout saga, said Sunday that he "may have overestimated the competence of the Greek government," suggesting Syriza staged the showdown without having a Plan B.
headquarters location