What is the relationship between 'Syriza' and 'Alexis Tsipras' in the context of the input sentence.
Options: founded by, chairperson, legal form, stock exchange

He views the forthcoming election as a positive because it would enable Alexis Tsipras to separate from the more radical elements of the Syriza party and be in a position to implement necessary reforms like work rule changes and pension modification.
chairperson