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There are three in total : the Sapperton Canal Tunnel at 2 miles 288 yards ( 3,482 m ) , and two railway tunnels , the longer being 1 mile 104 yards ( 1,704 m ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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