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The event was played as part of the Grand Prix Tennis Tour from 1978 to 1989 and part of the Grand Prix Championship Series , the precursors to the Masters 1000 , from 1978 to 1988 .
 Grand Prix Tennis Tour, Prix
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Grand Prix Tennis Tour, Prix