Find the ids of reviewers who didn't only give 4 star.
SELECT rID FROM Rating WHERE stars != 4
SELECT rID FROM Rating WHERE stars != 4
[{'rID': 201}, {'rID': 203}, {'rID': 203}, {'rID': 204}, {'rID': 205}, {'rID': 205}, {'rID': 206}, {'rID': 206}, {'rID': 207}, {'rID': 208}]