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.

Chief executive Alan Joyce said the airline's operations at Sydney Airport had faced an uncertain future after that date, including possibly being shifted to Terminal 2, which currently houses rival Virgin Australia, Qantas subsidiary Jetstar and a number of smaller regional operators.

Answer: chief_executive_officer: Qantas, Alan Joyce; employer: Alan Joyce, Qantas