Utilize the input text as a context reference, choose the right relationship between Telstra and Melbourne from the options. Options: 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.

Telstra opened an innovation lab in Melbourne in August and chief executive Andy Penn has identified innovations in mobile technology and cloud computing as a key growth area for the company.

Answer: headquarters_location