CREATE TABLE Student_Course_Enrolment (date_of_enrolment VARCHAR(255), course_id VARCHAR(255)); CREATE TABLE Courses (course_id VARCHAR(255), course_name VARCHAR(255))
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"