What is the relationship between Telstra and Melbourne in the context of the input sentence. Choose an answer from: 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.

The telco group will on Wednesday announce in Melbourne the winner of the Telstra University Challenge, an annual competition where 21 teams pitch new software applications or inventions that use communications technology.

Answer: headquarters_location