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After graduating in 1855 , he spent two years studying at the laboratory of Friedrich Wöhler in the University of Göttingen , followed by a year at Robert Bunsen 's laboratory at Heidelberg .
 person: Friedrich Wöhler; organization: University of Göttingen; person: Robert Bunsen; organization: Heidelberg
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Friedrich Wöhler, University of Göttingen, Robert Bunsen, Heidelberg 
Answer:
 person: Friedrich Wöhler; organization: University of Göttingen; person: Robert Bunsen; organization: Heidelberg