Utilize the input text as a context reference, choose the right relationship between 'Duracell' and 'Berkshire Hathaway' from the options.
Options: position held, brand, owned by, currency

-- U.S. company Berkshire Hathaway (Sao Paolo: BERK34.SA - news ) to acquire U.S. personal care and cosmetics company Procter & Gamble's Duracell battery unit (notified June 23/deadline July 29)
owned by