42039
His musical education was thorough and his progress most rapid , for in 1778 , at the age of twenty-five , he was conductor of the Hamburg opera orchestra and in 1782 he was appointed musical director of the theatre , Riga .
 location: Hamburg; location: Riga
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Hamburg, Riga 
Answer:
 location: Hamburg; location: Riga