| http://www.w3.org/ns/prov#value | - The proviso here is that by 2050, Across Europe for example the size of the working the number of people over the age of 65 years population would decline significantly (20% by may no longer be a meaningful definition for ???old 2050) without international migration, exacerbating age???, and the ???working age??? population may be the age dependency ratio and threatening economic significantly ext
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