Complete the following Fischer diagram so that it represents (2R,3S)-butane-2,3-diol. 
Definitions:
Gilded Age
A period in the late 19th century in the United States characterized by rapid industrialization, economic growth, and the ostentatious wealth of a burgeoning class of industrialists and financiers.
Gini Coefficient
A measure ranging from 0 to 1 that indicates the degree of income inequality in a given population, with 0 expressing perfect equality and 1 indicating maximum inequality.
Income Equality
A situation in which earnings are distributed evenly across a population, minimizing the gap between the highest and lowest incomes.
European Countries
Nations located within the continent of Europe, each characterized by its own government, culture, and economic system.
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