* ABI /SAB MILLER : Anheuser-Busch InBev is asking banks to underwrite up to $70 billion in debt financing to back its potential takeover of SABMiller (Xetra: BRW1.DE - news ) , banking sources said.
What is the relationship between 'SABMiller' and 'Anheuser-Busch InBev' in the context of the input sentence.
Options: original broadcaster, owned by, stock exchange, chief executive officer