7434
" Constitutional law " is a body of law which defines the role , powers , and structure of different entities within a state , namely , the executive , the parliament or legislature , and the judiciary ; as well as the basic rights of citizens and , in federal countries such as the United States and Canada , the relationship between the central government and state , provincial , or territorial governments .
 United States, Canada
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States, Canada