Task: Text to Code
Input (English): Step 1: For each row in section table, find the corresponding rows in takes table.
Step 2: find the number of rows of each value of takes's semester in the results of step 1.
Step 3: find takes's semester, section's year of step 1 results with smallest value in the results of step 2
Output (English): SELECT T2.semester , T1.year FROM section AS T1 JOIN takes AS T2 ON T1.year = T2.year GROUP BY T2.semester ORDER BY Count ( * ) Asc LIMIT 1