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North of Horns Bridge , however , it has been dualled and re-routed to follow the alignment of the GCR Chesterfield Loop through the town , including opening out the former railway tunnel .
 GCR Chesterfield
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 GCR Chesterfield