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Robert H. Johnson , later a state senator from Rock Springs , worked for the Richardsons as managing editor and general manager of the Daily Rocket-Miner from 1948 to 1961 .
 Robert H. Johnson, Rock Springs, Daily Rocket-Miner
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Robert H. Johnson, Rock Springs, Daily Rocket-Miner