261052
Exceptions Even where it is not authorised , a shunting movement can be allowed to enter a portion of line that is already occupied providing that it is for the purpose of : Driving towards another train When it is permitted to drive a train towards the rear of another train which is moving forward , such as where trains queue to enter or exit a depot , the driver must : References
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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:
 None