German luxury car makers Audi, a unit of Volkswagen AG VLKAY 0.06 % , Mercedes-Benz parent Daimler AG DDAIY 0.85 % , and BMW AG BMW -0.49 % have agreed in principle to purchase the telecommunications group’s digital mapping service Nokia Here, according to a person familiar with the situation.
Utilize the input text as a context reference, choose the right relationship between 'Daimler AG' and 'Mercedes-Benz' from the options.
Options: brand, parent organization, subsidiary, chairperson