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He was posted in various parts of western Northern Ireland , including Eglinton , Coalisland and Strabane before sitting his sergeant 's examinations .
 Northern, Eglinton, Coalisland, Strabane
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Northern, Eglinton, Coalisland, Strabane