56470
As technology advanced , narrow valleys proved unsuitable for larger steam-driven mills , but the Derbyshire mills remained , trading in finishing and niche products .
 location: Derbyshire
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: Derbyshire 
Answer:
 location: Derbyshire