Table schema:
CREATE TABLE Student_Course_Enrolment (date_of_enrolment VARCHAR, course_id VARCHAR); CREATE TABLE Courses (course_id VARCHAR, course_name VARCHAR)

Question: What is the date of enrollment of the course named "Spanish"?
SQL: SELECT T2.date_of_enrolment FROM Courses AS T1 JOIN Student_Course_Enrolment AS T2 ON T1.course_id = T2.course_id WHERE T1.course_name = "Spanish"