Utilize the input text as a context reference, choose the right relationship between Steve Ballmer and Microsoft 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.

Former Microsoft boss Steve Ballmer was recently dismissive of Amazon's ability to make money.

Answer: owner_of