What are the names of the technicians that have not been assigned to repair machines?
SELECT Name FROM technician WHERE technician_id NOT IN (SELECT technician_id FROM repair_assignment)
SELECT Name FROM technician WHERE technician_id NOT IN (SELECT technician_id FROM repair_assignment)
[{'Name': 'Mark Sewell'}, {'Name': 'Lou Boudreau'}, {'Name': 'Joe Cochrane'}, {'Name': 'Eddie Collins'}, {'Name': 'Mickey Cochrane'}]