Task: Text to Code
Input (English): Step 1: For each row in Courses table, find corresponding rows in Subjects table and in Student_Course_Enrolment table.
Step 2: find date_of_enrolment of the results of step 1 whose subject_name equals Spanish
Output (English): SELECT T3.date_of_enrolment FROM Subjects AS T1 JOIN Courses AS T2 ON T1.subject_id = T2.subject_id JOIN Student_Course_Enrolment AS T3 ON T2.course_id = T3.course_id WHERE T1.subject_name = "Spanish"