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Most , however , proved to be unrelated to Sebacina and were removed in 1957 by Ervin , who shuffled some species to Heterochaetella ( for example , Heterochaetella dubia , now Stypella dubia ( Bourdot & Galzin ) P. Roberts ) , Bourdotia and Exidiopsis .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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