query: SELECT document_type_name ,  document_type_description FROM Ref_document_types WHERE document_type_code  =  "RV"
question: Give me the name and description of the document type code RV.
query_toks: SELECT document_type_name , document_type_description FROM Ref_document_types WHERE document_type_code = `` RV ''
query_toks_no_value: select document_type_name , document_type_description from ref_document_types where document_type_code = value
question_toks: Give me the name and description of the document type code RV.