What is the relationship between Realogy and Century 21 Real Estate 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.

Century 21 Real Estate LLC is a subsidiary of Realogy Holdings Corp. ( RLGY ), a global leader in real estate franchising and provider of real estate brokerage, relocation and settlement services.
subsidiary