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any expense incurred by the taxpayer for the purpose of determining the existence, location, extent or quality of a mineral resource in that country, including any expense incurred in the course of
any expense incurred by the taxpayer for the purpose of determining the existence, location, extent or quality of a mineral resource in that country, including any expense incurred in the course of
any expense incurred by the taxpayer for the purpose of determining the existence, location, extent or quality of a mineral resource in that country, including any expense incurred in the course of