What is the relationship between Uniper and Fortum 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.

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

Answer: owned_by