157812
Causes AECB can be caused by : Although the condition of a patient with chronic bronchitis can become exacerbated by many other factors as well , the scope is generally restricted to the ones that cause the symptoms below .
 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