Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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.
Text: Prime Minister Alexis Tsipras was heavily reliant on support from the opposition in getting the vote to pass, following dissent from radical left hardliners within the governing Syriza party.
user
chairperson: Syriza, Alexis Tsipras
assistant