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Currently , the fastest train in India is the Bhopal Shatabdi , which has a top speed of Current effort to increase speed to 160-180 km/h For the first time in the history of Indian Railways , it aims to increase the speed of passenger trains to 160 – 180 km/h on dedicated conventional tracks .
 Indian Railways, trains
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Indian Railways, trains