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.

Other Articles Capital infusion of Rs 20,000 cr likely by Sept: Banking Secretary Capital infusion of Rs 25,000 crore a good beginning: Raghuram Rajan After uproar, government ups budget for social welfare Greek Prime Minister Alexis Tsipras has defeated a bid by dissenters in his left-wing Syriza party to push for an end to bailout talks and an exit from the euro currency.

Answer: chairperson