24423
" Careful sapping forward , supported by enfilading ricochets , was a key feature of this system , and it even allowed Vauban to calculate the length of time a siege would take .
 Vauban
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vauban