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The Washington , Idaho and Montana Railway ( WI&M ) finished its line in 1907 , extending east from Palouse to Purdue , Idaho .
 Idaho, Railway, Palouse, Idaho
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Idaho, Railway, Palouse, Idaho