Utilize the input text as a context reference, choose the right relationship between Syriza and Alexis Tsipras from the options. Options: 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.

Greece is set to receive the first instalment of its third multi-billion-euro bailout, as Prime Minister Alexis Tsipras mulls whether to hold early elections after the austerity bailout split his radical left Syriza party
chairperson