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Railway Ministry personnel presented that , this network construction is a part of the national railway backbone telecommunication reform project .
 Railway Ministry, Railway Ministry personnel, network, railway
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 Railway Ministry, Railway Ministry personnel, network, railway