Task: Text to Code
Input (English): Step 1: find the Fname of Student table for which city_code equals PHL.
Step 2: find the Fname of Student table for which Age less than 20.
Step 3: show the rows that are in both the results of step 1 and the results of step 2
Output (English): SELECT Fname FROM Student WHERE city_code = "PHL" INTERSECT SELECT Fname FROM Student WHERE Age < 20