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They had two sons , Karl Ulrich Schnabel ( 1909 – 2001 ) who also became a classical pianist and renowned piano teacher , and Stefan Schnabel ( 1912 – 99 ) , who became a well regarded actor .
 person: Karl Ulrich Schnabel; person: Stefan Schnabel
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: Karl Ulrich Schnabel, Stefan Schnabel 
Answer:
 person: Karl Ulrich Schnabel; person: Stefan Schnabel