Which engineers have never visited to maintain the assets? List the engineer first name and last name.
SELECT first_name ,  last_name FROM Maintenance_Engineers WHERE engineer_id NOT IN (SELECT engineer_id FROM Engineer_Visits)
SELECT first_name ,  last_name FROM Maintenance_Engineers WHERE engineer_id NOT IN (SELECT engineer_id FROM Engineer_Visits)
[{'first_name': 'Clemens', 'last_name': 'Orn'}, {'first_name': 'Samanta', 'last_name': 'Hauck'}, {'first_name': 'Manley', 'last_name': 'Grady'}, {'first_name': 'Josie', 'last_name': 'Harvey'}, {'first_name': 'Brian', 'last_name': 'Stamm'}, {'first_name': 'Weston', 'last_name': 'Hahn'}, {'first_name': 'Jules', 'last_name': 'Goldner'}]