Can you show me the start date for all these grants?
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'
start date for all these grants refers to grant_start_date; joining tables to filter based on conditions; INTERSECT used to find common data satisfying both 'Regular' and 'Initial Application' document descriptions;