47838
Interest has been expressed in Western Canada , where CANDU reactors are being considered as heat and electricity sources for the energy-intensive oil sands extraction process , which currently uses natural gas .
 location: Western Canada
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: Western Canada 
Answer:
 location: Western Canada