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After the start of World War I , her four 120 " mm main guns were landed and her four 75 " mm ( 12-pounder ) secondary guns were modified for anti-aircraft fire .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None