CREATE TABLE Courses (course_name VARCHAR, author_id VARCHAR)
CREATE TABLE Course_Authors_and_Tutors (author_id VARCHAR, personal_name VARCHAR)

Find the names of courses taught by the tutor who has personal name 'Julio'.
SELECT T2.course_name FROM Course_Authors_and_Tutors AS T1 JOIN Courses AS T2 ON T1.author_id = T2.author_id WHERE T1.personal_name = "Julio"
SELECT "T2"."course_name" FROM "Course_Authors_and_Tutors" AS "T1" JOIN "Courses" AS "T2" ON "T1"."author_id" = "T2"."author_id" WHERE "Julio" = "T1"."personal_name"