137808
In 1984 , an American businessman Danny Douglas approached Czechoslovak authorities ( Embassy in Vienna ) with an offer to pay 250,000 USD for the right to excavate and export abroad an otherwise unidentified object “ which nobody here misses anyway ” .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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