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 'MillerCoors' and 'SABMiller'.
Options: owner of, manufacturer, parent organization, publisher