... A FLEXIBLE NATURAL LANGUAGE PARSER BASED ON A TWO-LEVEL REPRESENTATION OF SYNTAX Leonardo Lesmo and Pietro Torasso Istituto di Scienze dell'Informazione Universit~ ... In this paper we present a parser which al lows to make explicit the interconnections between syntax and semantics, to analyze the sentences in a quasi-deterministic fashion and, in many cases, ... system, however, as in most N.L. interpreters, the anal~ sis of the input sentence is mainly syntax- driven; for this reason, justin case the input sentence respects the constraints imposed...