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