7795
About 2.5 billion years ago ( Siderian ) , Siberia was part of a continent of Arctica , along with the Canadian Shield .
 location: Siberia; location: Arctica; location: Canadian Shield
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Siberia; location: Arctica; location: Canadian Shield