58344
Development of earlier derivatives of the R.I revealed serious problems with the Maybach HS engine originally specified for these aircraft , and the R. VII was fitted with Mercedes D. IVa engines instead .
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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