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One of them , Geometriae pars universalis ( The Universal Part of Geometry ) , was published in Padua ; the other , Exercitationes geometrica ( Geometrical Exercises ) , at London .
 Padua, London
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Padua, London