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As such , the Semmelweis story is often used in university courses with epistemology content , e.g. philosophy of science courses - demonstrating the virtues of empiricism or positivism and providing a historical account of which types of knowledge count as scientific ( and thus accepted ) knowledge , and which do not .
 Semmelweis
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Semmelweis