54659
Organic chemistry was developed by Justus von Liebig and others , following Friedrich Wöhler 's synthesis of urea which proved that living organisms were , in theory , reducible to chemistry .
 person: Justus von Liebig; person: Friedrich Wöhler
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Justus von Liebig, Friedrich Wöhler 
Answer:
 person: Justus von Liebig; person: Friedrich Wöhler