In the context of the input sentence, determine the relationship between 'SABMiller' and 'Anheuser-Busch InBev'.
Options: publisher, currency, brand, parent organization

U.S.-listed shares of Anheuser-Busch InBev were up 5.9 percent at $114.40 after the world's biggest beer maker approached rival SABMiller about a takeover.
parent organization