188620
It was instituted in January 1936 by King George II in the memory of his grandmother ( Queen Olga ) and his mother ( Queen Sophia ) .
 King George II, Queen Olga, Queen Sophia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 King George II, Queen Olga, Queen Sophia