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The Royal Commonwealth Ex-Services League was founded in 1921 in Cape Town , South Africa , as the British Empire Services League by Field Marshal Earl Haig and Field Marshal Jan Smuts in order to link together ex-service organizations from throughout the British Empire .
 Commonwealth Ex-Services, Jan Smuts
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Commonwealth Ex-Services, Jan Smuts