79823
A second attempt took place in 437 " BC on the same site under the guidance of Hagnon , son of Nicias , which was successful .
 Hagnon, Nicias
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hagnon, Nicias