name the company whose one of the product is oprah: where are they now ? and has one of the key person as oprah winfrey ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_product dbr_Oprah:_Where_Are_They_Now%3F sep_dot var_uri dbo_keyPerson dbr_Oprah_Winfrey sep_dot var_uri a dbo_Company brack_close