42725
In 2011 , the Gorseinon built-up area had a population of 20,581 and the Pontarddulais built-up area had a population of 9,073 .
 Gorseinon, Pontarddulais
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gorseinon, Pontarddulais