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In 1807 he was a professor at the Lyceum at Bremen , and in 1812 became a professor of natural history and botany at the University of Rostock , where he was also director of the botanical gardens .
 location: Bremen; organization: University of Rostock
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: Bremen, University of Rostock 
Answer:
 location: Bremen; organization: University of Rostock