Headquartered in Middleton, WI, the company sells products exclusively at americangirl.com ; at all American Girl retail locations nationwide; through American Girl’s award-winning catalogue; and at American Girl specialty boutiques at select Indigo ™ and Chapters ™ locations in Canada and at El Palacio de Hierro Interlomas and Perisur locations in Mexico.
What is the relationship between 'Chapters' and 'Indigo' in the context of the input sentence.
Options: manufacturer, distribution format, parent organization, subsidiary