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15th Field Artillery Regiment , RCA , is a Primary Reserve Royal Canadian Artillery ( RCA ) regiment based in Vancouver , British Columbia , at the Bessborough Armoury .
 15th Field Artillery, Royal Canadian Artillery, Vancouver, British Columbia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 15th Field Artillery, Royal Canadian Artillery, Vancouver, British Columbia