query: SELECT document_id FROM Documents EXCEPT SELECT document_id FROM Documents_with_expenses
question: Are Returning id document that do not have expense.
query_toks: SELECT document_id FROM Documents EXCEPT SELECT document_id FROM Documents_with_expenses
query_toks_no_value: select document_id from documents except select document_id from documents_with_expenses
question_toks: Are Returning id document that do not have expense.