query: SELECT DISTINCT artist_name FROM artist WHERE country  =  "Bangladesh" EXCEPT SELECT DISTINCT artist_name FROM song WHERE rating  >  7
question: Do Find name of artist that which from Bangladesh and ain't a-received a rating more higher to 7.
query_toks: SELECT DISTINCT artist_name FROM artist WHERE country = `` Bangladesh '' EXCEPT SELECT DISTINCT artist_name FROM song WHERE rating > 7
query_toks_no_value: select distinct artist_name from artist where country = value except select distinct artist_name from song where rating > value
question_toks: Do Find name of artist that which from Bangladesh and ain't a-received a rating more higher to 7.