36470
An " expert witness " , particularly in common law countries such as the United Kingdom , Australia , and the United States , is a person whose opinion by virtue of education , training , certification , skills or experience , is accepted by the judge as an expert .
 United Kingdom, Australia, United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United Kingdom, Australia, United States