6013
According to Cassius Dio , the conspirators approached Nerva as a potential successor prior to the assassination , suggesting that he was at least aware of the plot .
 person: Cassius Dio; person: Nerva
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Cassius Dio; person: Nerva