145492
The Dan River Coalfield is a coalfield in Stokes and Rockingham Counties , North Carolina about which , in 1914 , USGS geologist Mr. R.W. Stone wrote , " after a thorough and careful examination of the Triassic beds in the Dan River Field the conclusion is reached that there is no reason to expect to find commercially valuable coal beds in this district . "
 Stokes, Rockingham, North Carolina, USGS
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 Stokes, Rockingham, North Carolina, USGS