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any oil or gas well in Canada or any real property or immovable in Canada the principal value of which depends on its petroleum, natural gas or related hydrocarbon content (not including any depreciable property),
any oil or gas well in Canada or any real property or immovable in Canada the principal value of which depends on its petroleum, natural gas or related hydrocarbon content (not including any depreciable property),
any oil or gas well in Canada or any real property or immovable in Canada the principal value of which depends on its petroleum, natural gas or related hydrocarbon content (not including any depreciable property),
any oil or gas well in Canada or any real property in Canada the principal value of which depends on its petroleum or natural gas content (but not including any depreciable property),