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He also simplified travel in Brandenburg and the Duchy of Prussia by connecting riverways with canals , a system that was expanded by later Prussian architects , such as Georg Steenke ; the system is still in use today .
 location: Brandenburg; location: Duchy of Prussia; person: Georg Steenke
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: Brandenburg, Duchy of Prussia, Georg Steenke 
Answer:
 location: Brandenburg; location: Duchy of Prussia; person: Georg Steenke