Utilize the input text as a context reference, choose the right relationship between Fortum and Uniper 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.

This regrouping increased the sales of approximately EUR 4.4 billion in Fortum consolidated income statement compared to the separately Uniper reported numbers.

Answer: owner_of