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What are often called " traditional " working narrowboats were the product of the main canal system – but the craft that plied the 46 miles between Chesterfield , Retford , and the River Trent were very different .
 location: Chesterfield; location: Retford; location: River Trent
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Chesterfield; location: Retford; location: River Trent