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Mount St. Helens , a highly active volcano northeast of the city in Washington state , is easily visible on clear days and is close enough to have dusted the city with volcanic ash after its eruption on May 18 , 1980 .
 Mount St. Helens, Washington
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mount St. Helens, Washington