197377
In 1830 , when Serbia obtained its autonomy , Milan Obrenović became the designated heir of his father .
 location: Serbia; person: Milan Obrenović
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: Serbia, Milan Obrenović 
Answer:
 location: Serbia; person: Milan Obrenović