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The Tortoise " heavy assault tank " , intended for use in breaking through fixed defensive lines , was well armoured and had a very powerful 32-pounder ( 94 " mm ) gun , but did not reach service use .
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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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