The third age, the Third World and the third millennium.
Diczfalusy
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E
D000367:Age Factors; D000368:Aged; D000375:Aging; D003906:Developing Countries; D004992:Ethics, Medical; D005260:Female; D006801:Humans; D008017:Life Expectancy / Q000639:trends; D008297:Male; D009017:Morbidity; D009026:Mortality; D011156:Population Density; D012941:Social Responsibility