Question: How many lessons taken by customer with first name as Ryan and last name as Goodwin were completed?
SQL: SELECT count ( * )  FROM Lessons AS T1 JOIN Customers AS T2 ON T1.customer_id   =  T2.customer_id WHERE T2.first_name  =  "Rylan" AND T2.last_name  =  "Goodwin" AND T1.lesson_status_code  =  "Completed"