What is the relationship between Syriza and Alexis Tsipras in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

"The timetable is tight so we are forced into this emergency procedure," Gerasimos Balaouras, a lawmaker from the leftist Syriza party of Prime Minister Alexis Tsipras said, kickstarting the debate in parliamentary committees.
chairperson