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The most obvious one with the greatest effect on the corporation was at Impala where we had the furnace failure , " Gilbertson said .
 Impala, Gilbertson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Impala, Gilbertson