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His immediate predecessors Livius and Naevius had asserted their place among traditional Roman poets , or vates , by continuing to invoke instead the Camenae , a group of goddesses , varying in number , who were associated with fresh-water springs , or fontes , and thus metaphorically " sources " of inspiration .
 person: Livius; person: Naevius
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Livius, Naevius 
Answer:
 person: Livius; person: Naevius