60490
focused on the identification , isolation , improvement , and marketing of a wide variety of mineral properties in Washington , Alaska , Canada , and Nevada , pursuing copper , uranium , nickel , coal , magnetite , lead , silver , and gold .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None