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The underground volcanic activity which causes the hot springs also forced carbon dioxide into a cave , which was called the Plutonium , which here means " place of the god Pluto " .
 location: Plutonium; person: Pluto
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Plutonium; person: Pluto