113989
Dust-Off is a brand of dust cleaner ( refrigerant-based propellant cleaner , which is not compressed air and incorrectly called " canned air " ) containing difluoroethane ; it is used to remove particulates and dust from computers and electronic equipment .
 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