What are the names of countains that no climber has climbed?
SELECT Name FROM mountain WHERE Mountain_ID NOT IN (SELECT Mountain_ID FROM climber)
SELECT Name FROM mountain WHERE Mountain_ID NOT IN (SELECT Mountain_ID FROM climber)
[{'Name': 'Ngaliema / Mt Stanley (Margherita Pk)'}, {'Name': 'Ngaliema / Mt Stanley (Savoia Pk)'}]