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The 1980 Monte Carlo Open was a men 's tennis tournament played on outdoor clay courts at the Monte Carlo Country Club in Monte Carlo , Monaco that was part of the 1980 Volvo Grand Prix circuit .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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