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Over the ensuing years , he would be an impressive Moscow spokesman on arms control , and defend stubbornly , even abjectly , the 1983 shooting down of a civilian Korean Airlines 747 that had veered into Soviet air space .
 years, Moscow, 1983, Korean Airlines, 747, Soviet
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:
 years, Moscow, 1983, Korean Airlines, 747, Soviet