351652
The index combines a number of factors associated with terrorist attacks to build a thorough picture of the impact of terrorism over a 10-year period , illustrating trends , and providing a data series for analysis by researchers and policymakers .
 None
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:  
Answer:
 None