184025
It is part of the Blacksburg - Christiansburg - Radford Metropolitan Statistical Area which encompasses all of Montgomery County , Virginia and the Virginia cities of Blacksburg , Christiansburg , and Radford for statistical purposes .
 Blacksburg, Christiansburg, Radford, Montgomery, Blacksburg, Christiansburg, Radford
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Blacksburg, Christiansburg, Radford, Montgomery, Blacksburg, Christiansburg, Radford