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An officer in the Hellenic Army , at the time of the Turkish invasion of Cyprus in 1974 , he was a Lt. Colonel and CO of the 251st Battalion of the Cypriot National Guard , the unit closest to the Turkish landing site .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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