Show ids for all documents with budget types described as 'Government'.
create table documents_with_expenses (document_id varchar, budget_type_code varchar, PRIMARY KEY (document_id)); create table ref_budget_codes (budget_type_code varchar, budget_type_description varchar, PRIMARY KEY (budget_type_code))
select t1.document_id from documents_with_expenses as t1 join ref_budget_codes as t2 on t1.budget_type_code = t2.budget_type_code where t2.budget_type_description = "government"