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One projection in 1999 estimated that DNA trapped in amber could last up to 100 " million years , far beyond most estimates of around 1 " million years in the most ideal conditions , although a later 2013 study was unable to extract DNA from insects trapped in much more recent Holocene copal .
 location: Holocene
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: Holocene 
Answer:
 location: Holocene