104148
Serbia undertook some significant developments in meteorology with academics Pavle Vujević , Director of Belgrade Observatory , and Milutin Milanković , one of the most renowned scientists of his time , who began his work in the field of climatology .
 location: Serbia; person: Pavle Vujević; organization: Belgrade; person: Milutin Milanković
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, Pavle Vujević, Belgrade, Milutin Milanković 
Answer:
 location: Serbia; person: Pavle Vujević; organization: Belgrade; person: Milutin Milanković