As we strive for sophisticated machine translation and reliable information extraction, we have launched a subproject pertaining to the revelation of reference and information structure in (Hungarian) declarative sentences. The crucial part of information extraction is a procedure whose input is a sentence, and whose output is an information structure, which is practically a set of possible operator scope orders (acceptance). A similar procedure forms the first half of machine translation, too: we need the information structure of the source-language sentence. Then an opposite procedure should come (generation), whose input is an information structure, and whose output is an intoned word sequence, that is, a sentence in the target language. We can base the procedure of acceptance (in the above sense) upon that of generation, due to the reversibility of Prolog mechanisms. And as our approach to grammar is "totally lexicalist", the lexical description of verbs is responsible for the order and intonation of words in the generated sentence.Alberti G., KÃąroly M. and Kleiber J. From Sentences to Scope Relations and Backward.