4344
History Gold mining in the belt became active after an 1869 study of the Juneau mining district , of which the Juneau gold belt is but one part .
 mining, Juneau mining district, Juneau
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 mining, Juneau mining district, Juneau