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Finally , virtually every modern warship will be fitted with small-calibre guns , including a CIWS , which is usually a radar-controlled Gatling gun of between 20 mm and 30 mm calibre capable of firing several thousand rounds per minute .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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