query: SELECT mailing_date FROM Documents_Mailed WHERE document_id = 7;
question: What-all of the document with i is the mails date might would 7?
query_toks: SELECT mailing_date FROM Documents_Mailed WHERE document_id = 7 ;
query_toks_no_value: select mailing_date from documents_mailed where document_id = value
question_toks: What-all of the document with i is the mails date might would 7?