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The 1997 Warsaw Cup by Heros was a tennis tournament played on outdoor clay courts at the Legia Tennis Centre in Warsaw in Poland that was part of Tier III of the 1997 WTA Tour .
 Warsaw, Warsaw, Poland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Warsaw, Warsaw, Poland