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Hilario Fernández Long ( 12 September 1918 – 23 December 2002 ) was an Argentine structural engineer and educator .
 Hilario Fernández Long, Argentine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hilario Fernández Long, Argentine