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John of Cornwall , possibly called in Latin Johannes Cornubiensis or Johannes de Sancto Germano was a 14th century scholar and teacher , author of the English grammar Speculum GrammaticaleHe is not to be confused with the twelfth-century theologian John of Cornwall who authored the Eulogium ad Alexandrum Papam III .
 Cornwall, John of Cornwall
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cornwall, John of Cornwall