The Athens General Index (.ATG) has fluctuated sharply this year, which has seen left-wing Prime Minister Alexis Tsipras's newly elected Syriza government wrangle with European Union and International Monetary Fund lenders in bitter bailout talks.
Take context from the input text and decide on the accurate relationship between 'Syriza' and 'Athens' from the options provided.
Options: operator, developer, headquarters location, chief executive officer