| http://www.w3.org/ns/prov#value | - Sources of revenue Sources of revenue are: 1) service relationship and employment relationship (including co-operative employment relationship), 2) activity carried on personally, 3) non-agricultural business activity, 4) special branches of agricultural production, 5) immovable property or parts of immovable property, 6) lease, sublease, tenancy, subtenancy and other contracts of a similar charac
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