What is the relationship between 'Syriza' and 'Alexis Tsipras' in the context of the input sentence.
Options: developer, chairperson, location of formation, business division

"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