List the authors who do not have submission to any workshop.
SELECT Author FROM submission WHERE Submission_ID NOT IN (SELECT Submission_ID FROM acceptance)
SELECT Author FROM submission WHERE Submission_ID NOT IN (SELECT Submission_ID FROM acceptance)
[{'Author': 'Rick Engles'}, {'Author': 'Don Bitterlich'}, {'Author': 'Steve Myer'}, {'Author': 'Randy Johnson'}, {'Author': 'Andy Bolton'}]