| http://www.w3.org/ns/prov#value | - However, there are some especially harsh environments, e.g. the Sahel, with large landless families and young people in search of work, where some kind of wage must be paid if a sizeable labour force is to be on hand during the dry season: without this indispensable input for group survival, the most able-bodied adults emigrate to other countries to earn more from their work.
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