31845
The bomber was one of the first 15 B-29 s built to the " Silverplate " specification - of 65 eventually completed during and after World War II - giving them the primary ability to function as nuclear " weapon delivery " aircraft .
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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:
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