182230
He practiced law from 1903 to 1917 in Pittsburgh , also serving as chairman of the Pennsylvania Industrial Accidents Commission , until serving as a major in field artillery in World War I until 1919 , after which he resumed practicing law .
 Pittsburgh, Pennsylvania
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pittsburgh, Pennsylvania