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Philipp Wilhelm Wirtgen ( December 4 , 1806 - September 7 , 1870 ) was a German botanist and teacher who was a native of Neuwied .
 Philipp Wilhelm Wirtgen, Neuwied
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Philipp Wilhelm Wirtgen, Neuwied