petrobas is the major oil company of what south american country
Petrobras Petróleo Brasileiro S.A. — Petrobras, more commonly known as simply Petrobras (Portuguese pronunciation: [ˌpɛtɾoˈbɾas]), is a semi-public Brazilian multinational corporation in the petroleum industry headquartered in Rio de Janeiro, Brazil. The company's name translates to Brazilian Petroleum Corporation — Petrobras.