20495
Little Leopold was ill in his infancy , and perhaps needed to be kept in Salzburg for this reason , but this does not explain why he was still kept there after his recovery .
 Leopold, Salzburg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Leopold, Salzburg