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In 1855 the Lehigh Canal carried over 1.2 million tons of anthracite coal ; by the 1930 s the company which built and operated it over a century pulled the plug .
 Lehigh Canal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lehigh Canal