For grants with both documents described as 'Regular' and documents described as 'Initial Application', list its start date.
CREATE TABLE Document_Types (
    document_type_code VARCHAR,
    document_description VARCHAR
)

CREATE TABLE Grants (
    grant_start_date VARCHAR,
    grant_id VARCHAR
)

CREATE TABLE Documents (
    grant_id VARCHAR,
    document_type_code VARCHAR
)
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'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: For grants with both documents described as 'Regular' and documents described as 'Initial Application', list its start date. ### Input: CREATE TABLE Document_Types (
    document_type_code VARCHAR,
    document_description VARCHAR
)

CREATE TABLE Grants (
    grant_start_date VARCHAR,
    grant_id VARCHAR
)

CREATE TABLE Documents (
    grant_id VARCHAR,
    document_type_code VARCHAR
) ### Response: 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'