367813
Upon the death of Doge Carlo Contarini on May 1 , 1656 , Valiero became a candidate as Doge .
 Carlo Contarini, Valiero
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Carlo Contarini, Valiero