Task: Text to Code
Input (English): Step 1: find the exhibition's Artist_ID of exhibition table for which Year equals 2004.
Step 2: find the Name of artist table whose artist's Artist_ID not one of the results of step 1
Output (English): SELECT T1.Name FROM artist AS T1 WHERE T1.Artist_ID NOT IN ( SELECT T2.Artist_ID FROM exhibition AS T2 WHERE T2.Year = 2004 )