Take context from the input text and decide on the accurate relationship between 'Smirnoff' and 'Diageo' from the options provided.
Options: distribution format, parent organization, founded by, headquarters location

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