For grants that have descriptions of Regular and Initial Applications, what are their start dates?
SELECT T1.grant_start_date FROM Grants AS T1 JOIN Documents AS T2 ON T1.grant_id  =  T2.grant_id JOIN Document_Types AS T3 ON T2.document_type_code  =  T3.document_type_code WHERE T3.document_description  =  'Regular' INTERSECT SELECT T1.grant_start_date FROM Grants AS T1 JOIN Documents AS T2 ON T1.grant_id  =  T2.grant_id JOIN Document_Types AS T3 ON T2.document_type_code  =  T3.document_type_code WHERE T3.document_description  =  'Initial Application'
SELECT T1.grant_start_date FROM Grants AS T1 JOIN Documents AS T2 ON T1.grant_id  =  T2.grant_id JOIN Document_Types AS T3 ON T2.document_type_code  =  T3.document_type_code WHERE T3.document_description  =  'Regular' INTERSECT SELECT T1.grant_start_date FROM Grants AS T1 JOIN Documents AS T2 ON T1.grant_id  =  T2.grant_id JOIN Document_Types AS T3 ON T2.document_type_code  =  T3.document_type_code WHERE T3.document_description  =  'Initial Application'
[{'grant_start_date': '1979-10-29 07:44:22'}, {'grant_start_date': '1982-04-07 00:07:43'}, {'grant_start_date': '2004-11-10 02:26:01'}]