14672
The Mark I was relatively expensive and time-consuming to manufacture , and reports from the field indicated that the knife 's large ' brass-knuckle ' fingerguard handle made it difficult to secure in conventional scabbards while limiting the range of useful fighting grip positions .
 None
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