312465
Operation To fire the No 3 , the user must fit the grenade into the rifle , insert the detonator , lay the rifle on the ground in the correct position , remove the safety pin , pull back the safety pin collar , insert a special blank round into the rifle , then fire .
 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