Utilize the input text as a context reference, choose the right relationship between Realogy and Coldwell Banker 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.

About Realogy Holdings Corp. Realogy Holdings Corp. ( RLGY ) is a global leader in residential real estate franchising and brokerage with many of the best-known industry brands including Better Homes and Gardens ® Real Estate, CENTURY 21 ® , Coldwell Banker ® , Coldwell Banker Commercial ® , The Corcoran Group ® , ERA®, Sotheby's International Realty ® and ZipRealty ® .

Answer: subsidiary