41937
Some scholars argue humans may have a predisposition for violence ( chimpanzees , also great apes , have been known to kill members of competing groups for resources like food ) , and is first documented to have started only relatively recently in the Holocene , an epoch that began about 11,700 years ago , probably with the advent of higher population densities due to sedentism .
 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