What are the names of the different artists from Bangladesh who never received a rating higher than a 7?
SELECT DISTINCT artist_name FROM artist WHERE country  =  "Bangladesh" EXCEPT SELECT DISTINCT artist_name FROM song WHERE rating  >  7
SELECT DISTINCT artist_name FROM artist WHERE country  =  "Bangladesh" EXCEPT SELECT DISTINCT artist_name FROM song WHERE rating  >  7
[{'artist_name': 'Farida'}, {'artist_name': 'Prity'}]