Analyze the relationship between 'SABMiller' and 'MillerCoors' within the context of the input sentence.
Options: legal form, parent organization, position held, subsidiary

All that said, this doesn't stop competitors including AB-acquisition target SABMiller and MolsonCoors joint venture MillerCoors from airing ads during games or from serving beers at their stadiums (as Coors has in Denver , for example).
subsidiary