Find the enrollment date for all the tests that have "Pass" result.
SELECT T1.date_of_enrolment FROM Student_Course_Enrolment AS T1 JOIN Student_Tests_Taken AS T2 ON T1.registration_id  =  T2.registration_id WHERE T2.test_result  =  "Pass"
SELECT T1.date_of_enrolment FROM Student_Course_Enrolment AS T1 JOIN Student_Tests_Taken AS T2 ON T1.registration_id  =  T2.registration_id WHERE T2.test_result  =  "Pass"
[{'date_of_enrolment': '2017-10-10 10:05:03'}, {'date_of_enrolment': '2017-09-21 07:05:01'}, {'date_of_enrolment': '2017-09-21 07:05:01'}, {'date_of_enrolment': '2017-09-06 06:27:15'}, {'date_of_enrolment': '2017-10-23 08:23:22'}, {'date_of_enrolment': '2017-08-02 17:21:44'}, {'date_of_enrolment': '2017-10-29 15:39:31'}, {'date_of_enrolment': '2017-11-13 12:49:33'}]