58875
In 1839 , Justus von Liebig , Friedrich Wöhler and Jöns Jacob Berzelius stated that yeast was not an organism and was produced when air acted on plant juice .
 Justus von Liebig, Friedrich Wöhler, Jöns Jacob Berzelius
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Justus von Liebig, Friedrich Wöhler, Jöns Jacob Berzelius