What is the relationship between 'Mattel' and 'Barbie' in the context of the input sentence.
Options: owner of, creator, owned by, employer

Bratz's return is well-timed, after Barbie has already taken a knocking from the flyaway success of Disney's Frozen-related merchandise, which recently transferred its licensing rights from Mattel to Hasbro (NasdaqGS: HAS - news ) as of 2016.
owner of