| http://www.w3.org/ns/prov#value | - The Company defines Adjusted EBITDA, a non-GAAP financial measure, as net income plus depreciation, depletion and amortization, non-cash charges, income tax expense, interest and other expense, and any impairment of mining assets, less non-controlling interests in operating income from consolidated subsidiaries, interest and other income, and any royalty portfolio restructuring gains or losses (se
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