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The men 's 4 × 100 metre medley relay event at the 1980 Summer Olympics was held in Moscow , Soviet Union on 24 July 1980 in the Olympiski Sports Complex .
 Moscow, Soviet Union
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Moscow, Soviet Union