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Around 1522 , Paracelsus made reference to an opium-based elixir that he called " laudanum " from the Latin word " laudare " , meaning " to praise " He described it as a potent painkiller , but recommended that it be used sparingly .
 Paracelsus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Paracelsus