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The Chatham Ministry was a British government led by William Pitt , 1st Earl of Chatham that ruled between 1766 and 1768 .
 Chatham, British, William Pitt , 1st Earl of Chatham
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chatham, British, William Pitt , 1st Earl of Chatham