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At Dunkeld in 1939 he led the Regiment on its last exercise on horseback before it was split in to two and re-roled as gunners .
 Dunkeld, gunners
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dunkeld, gunners