Analyze the relationship between 'Smirnoff' and 'Diageo' within the context of the input sentence.
Options: parent organization, distribution format, headquarters location, founded by

The Smirnoff vodka maker will buy out the Dutch brewer’s stake in Brandhouse, a sales and marketing entity, while Heineken will focus on beer, ending a joint venture with Diageo that began in 2004 to sell spirits, beer and cider in Africa.
parent organization