294422
After the execution of Edward Stafford , 3rd Duke of Buckingham in 1521 , the Staffords , who were descended from several branches of the royal family tree , lost much of their power and lands .
 Edward Stafford , 3rd Duke of Buckingham
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Edward Stafford , 3rd Duke of Buckingham