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).
Take context from the input text and decide on the accurate relationship between 'SABMiller' and 'MillerCoors' from the options provided.
Options: position held, legal form, parent organization, subsidiary