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McCallum then sought the Conservative Party nomination for the 2006 Canadian election in the riding on Newton — North Delta , after the incumbent Gurmant Grewal stepped down .
 McCallum, Conservative Party, Gurmant Grewal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 McCallum, Conservative Party, Gurmant Grewal