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Derbyshire Dales Narrow Gauge Railway is a short narrow-gauge railway operating at Rowsley South , and operates ex-industrial diesels and carriages similar to the Golden Valley light railway at Butterley , but as the running line is presently shorter one day there is hope of a further extension so the line can live up to its name of ' Derbyshire Dales narrow gauge railway ' .
 Butterley
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Butterley