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Al Bir ( ar : البير ) is a village in Saudi Arabia , and a village of Al-Mehmal area ( Known nowadays as Thadig ) , which is one of the populous urban areas in Riyadh region .
 Saudi Arabia, Thadig, Riyadh
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Saudi Arabia, Thadig, Riyadh