Petroleo Brasileiro , Brazil 's government-run oil company , known as Petrobras , said it was in preliminary talks with Lyondell Chemical of Texas to buy its controlling stake in an oil refinery in Houston .
Brazil /business/company_shareholder/major_shareholder_of Petrobras
Petrobras /business/company/major_shareholders Brazil
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Brazil
LOCATION
Petrobras
ORGANIZATION
/business/company_shareholder/major_shareholder_of
Petrobras
ORGANIZATION
Brazil
LOCATION
/business/company/major_shareholders