Which grants are described as 'regular'?
SELECT * 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'
grants described as 'regular' refers to filtering by document_description = 'Regular'; requires joining Grants, Documents, and Document_Types tables based on grant_id and document_type_code;