Greece's government on Tuesday submitted tough bailout terms demanded by eurozone creditors to parliament, as Prime Minister Alexis Tsipras battled for support for the draconian reforms from his ruling anti-austerity Syriza party.
In the context of the input sentence, determine the relationship between 'Syriza' and 'Alexis Tsipras'.
Options: director/manager, location of formation, business division, chairperson