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These speeds were made possible by its 25 kV AC railway electrification system in place of the traditional Italian system of 3 kV DC , and the new signaling , control and train protection system provided by the European Rail Traffic Management System / European Train Control System ( ETCS ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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