34109
In the 1st century BC , Posidonius confirmed Eratosthenes 's results by comparing stellar observations at two separate locations .
 person: Posidonius; person: Eratosthenes
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: Posidonius, Eratosthenes 
Answer:
 person: Posidonius; person: Eratosthenes