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The technique was developed by Henri Padé , but goes back to Georg Frobenius who introduced the idea and investigated the features of rational approximations of power series .
 Henri Padé, Georg Frobenius
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Henri Padé, Georg Frobenius