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It should be noted that Eusebius ' own Praeparatio Evangelica does not adopt the common notion ( which occurs at least as early as Clement of Alexandria ) of Greek philosophy as a " preparation for the Gospel . "
 Eusebius
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Eusebius