| http://www.w3.org/ns/prov#value | - I. If the income be derived from the rent of houses, lands, tenements, manufacturing or mining establishments, fixtures and machinery, mills, springs of salt or oil, or veins of coal, iron or other minerals, there shall be deducted from the gross amount of the annual rent a sum sufficient for the necessary annual repairs, not exceeding ten per centum on said rent, except that the rent derived from
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