4088
By the Oligocene and Miocene , ants had come to represent 20 – 40 % of all insects found in major fossil deposits .
 location: Oligocene; location: Miocene
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: Oligocene, Miocene 
Answer:
 location: Oligocene; location: Miocene