What is the relationship between Mattel and Barbie 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.

After surveying more than 1,000 women, including moms, Piper Jaffray said it believes that there is improving sentiment among moms for key Mattel brands, including Fisher-Price, Barbie and Disney Princesses.

Answer: owner_of