31952
His place was taken by Bruno Walter as guest conductor for 1922 - 23 , then by Henri Verbrugghen .
 Bruno Walter, Henri Verbrugghen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Bruno Walter, Henri Verbrugghen