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Aurel “ Dutch ” Vaszin ( 1885-1979 ) was a carpenter , engineer and roller coaster designer , best known for heading the National Amusement Device company and designing some of the largest roller coasters of his day .
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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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