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In the United States , for example , the competition between museums for public attention led directly to the Bone Wars of the 1880 s and 1890 s , during which a pair of feuding paleontologists made enormous scientific contributions .
 location: United States
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: United States