PAGE A15 Inquiry Puts Focus on Buffett Investigators on three continents are examining units of Warren Buffett 's Berkshire Hathaway for possible financial manipulation .
Berkshire Hathaway /business/company/major_shareholders Warren Buffett
Warren Buffett /business/person/company Berkshire Hathaway
Warren Buffett /business/company_shareholder/major_shareholder_of Berkshire Hathaway
NN NN NNP VBZ NN IN NNP NNS IN CD NNS VBP VBG NNS IN NNP NNP POS NNP NNP IN JJ JJ NN .
Berkshire Hathaway
ORGANIZATION
Warren Buffett
PERSON
/business/company/major_shareholders
Warren Buffett
PERSON
Berkshire Hathaway
ORGANIZATION
/business/person/company
Warren Buffett
PERSON
Berkshire Hathaway
ORGANIZATION
/business/company_shareholder/major_shareholder_of