Utilize the input text as a context reference, choose the right relationship between RTL and RTL Group 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.

"With our financial strength, it is our ambition to significantly grow RTL Group over the next years – to transform the leading European entertainment network into a global force in video production, aggregation and monetisation," RTL said.

Answer: owned_by