Utilize the input text as a context reference, choose the right relationship between 'Syriza' and 'Athens' from the options.
Options: industry, product/material produced, headquarters location, business division

Concerns for future The Athens General Index has fluctuated sharply this year, which has seen Tsipras's newly elected Syriza government wrangle with European Union and International Monetary Fund lenders in bitter bailout talks.
headquarters location