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Originally steam , later diesel locomotives brought trains , particularly coal from the Nottinghamshire coalfield to the down sidings , where the motive power was changed to electric traction for the run over Woodhead to Mottram yard where it was changed again for steam ( later diesel ) to continue its journey .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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