| http://www.w3.org/ns/prov#value | - The concessions are necessary for Brazil to develop new discoveries as quickly as possible, especially at a time when state-run oil company Petrobras, a mandatory partner in the big new fields, is struggling to meet existing production targets.But a provision in the original bill to change royalties on existing concessions met stiff opposition in Rio, responsible for three-quarters of Brazil???s c
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