query: SELECT document_type_code FROM Ref_document_types WHERE document_type_name  =  "Paper"
question: What is the document type code for document type "Paper"?
query_toks: SELECT document_type_code FROM Ref_document_types WHERE document_type_name = `` Paper ''
query_toks_no_value: select document_type_code from ref_document_types where document_type_name = value
question_toks: What is the document type code for document type "Paper"?