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The flow now defines a map , the Poincaré map " F " " : " " S " " → " " S " , for points starting in " S " and returning to " " S " .
 Poincaré
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Poincaré