18841
He was playing the violin at the age of three , but soon developed an interest in the piano , which he studied in Warsaw with Aleksander Michałowski before making his debut in Antwerp in 1906 .
 location: Warsaw; person: Aleksander Michałowski; location: Antwerp
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: Warsaw, Aleksander Michałowski, Antwerp 
Answer:
 location: Warsaw; person: Aleksander Michałowski; location: Antwerp