Utilize the input text as a context reference, choose the right relationship between 'Syriza' and 'Athens' from the options.
Options: original broadcaster, headquarters location, developer, location of formation

The Athens stock market also fell around 3 percent as the country's prime minister looked set to call early elections in a bid to quell a rebellion in his leftist Syriza party and seal support for a tough bailout programme.
headquarters location