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Over the last 20 years , the world has experienced many economic crashes , affecting countries or regions such as Russia , Arab , Latin America and East Asia .
 the last 20 years, Russia, Arab, Latin America, East Asia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 the last 20 years, Russia, Arab, Latin America, East Asia