Greek Prime Minister Alexis Tsipras on Wednesday faced down a major mutiny in his radical left Syriza party and violent protests in the streets of Athens to win parliamentary approval for the draconian reforms demanded in return for a new 86-billion-euro bailout package.
Refer to the input text as context and select the correct relationship between 'Syriza' and 'Athens' from the available options.
Options: manufacturer, location of formation, business division, headquarters location