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Liebig and Wöhler found three hydrolysis products of amygdalin : sugar , benzaldehyde , and prussic acid ( hydrogen cyanide , HCN ) .
 Liebig, Wöhler
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Liebig, Wöhler