When parsing of an utterance yields several readings, one way in order to determine the intended meaning is to start a clarification dialog. During such a special dialog situation the multiple interpretations of the parsed utterance are contrasted by restating them in different text forms. Now, the dialog partner who produced the ambiguous utterance is requested to choose the appropriate paraphrase, e.g., by asking her `Do you mean X or Y ?'.
This situation has already been exemplified in section 5.3 fig. 5.3. In this example, parsing of S (`Remove the folder with the system tools') has lead to two readings LF' and LF''. The multiple semantic forms are then paraphrased by means of the utterances S' and S'' (`Do you mean ``Remove the folder by means of the systems tools'' or ``Remove the folder that contains the system tools''?').