SELECT document_status_description FROM Ref_Document_Status WHERE document_status_code = "working";
What is the description of document status code 'working'?
[Schema (values) (types)]: | cre_Doc_Control_Systems |  Ref_Document_Types : document_type_code (text) , document_type_description (text) | Roles : role_code (text) , role_description (text) | Addresses : address_id (text) , address_details (text) | Ref_Document_Status : document_status_code (text) , document_status_description (text) | Ref_Shipping_Agents : shipping_agent_code (text) , shipping_agent_name (text) , shipping_agent_description (text) | Documents : document_id (text) , document_status_code (text) , document_type_code (text) , shipping_agent_code (text) , receipt_date (text) , receipt_number (number) , other_details (text) | Employees : employee_id (text) , role_code (text) , employee_name (text) , other_details (text) | Document_Drafts : document_id (text) , draft_number (text) , draft_details (text) | Draft_Copies : document_id (text) , draft_number (text) , copy_number (text) | Circulation_History : document_id (text) , draft_number (text) , copy_number (text) , employee_id (text) | Documents_Mailed : document_id (text) , mailed_to_address_id (text) , mailing_date (text);