315425
Her father , Dr Karol Birger , had left his native Poland as a young man to join the great Dr Albert Schweitzer with whom he worked closely in Africa for several years .
 Birger, Albert Schweitzer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Birger, Albert Schweitzer