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In 1866 the South Eastern Counties Junction Railway was incorporated to build from a point on the Stanstead , Shefford and Chambly Railroad to a point on the province line in the township of Potton , Quebec which was completed in 1873 .
 Railway, Potton , Quebec
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Railway, Potton , Quebec