Nonetheless, it raises important questions about how to determine when a possessive form is desired. In some instances the therapist did not include words given by the student in the interpretation even though they often contributed to the intended meaning. There were things on the table in the dining room. Notice that occurs twice in the student's input, but only once in the interpretation. Compare this example with the possessive case above for an illustration of the difficulty in distinguishing this case from that of a possessive.
Girl clothes up.
She's hanging the clothes up. Note that in the above example does not occur in the output. They're setting up the table for lunch. Such multi-modal communication is beyond the ability of most AAC systems available today, but would be a fruitful area of future research. The information obtained from such a methodology can provide guidance and justification for the development of system knowledge bases and inferencing mechanisms.