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Dallas continued to collect and publish Pennsylvania decisions in a second volume of his Reports , and when the Supreme Court began hearing cases , he added those cases to his reports , starting towards the end of the second volume , “ 2 Dallas Reports ” .
 Dallas, Pennsylvania, Dallas
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dallas, Pennsylvania, Dallas