Greek Prime Minister Alexis Tsipras is trying to turn a corner after he reluctantly agreed to negotiate a third bailout, allowing the European Central Bank to top up bank credit lines but prompting a rebellion in his leftist Syriza party.
In the context of the input sentence, determine the relationship between 'Syriza' and 'Alexis Tsipras'.
Options: subsidiary, distributed by, member of, chairperson