Mm - hmm.
Because not every module keeps a memory of everything that happened. so  whenever the uh , um person is not actually rejecting what happened before , so as in " No I really don't want to see that movie. I 'd rather stay home and watch TV " um  What movie was selected in what cinema in what town is  is going to be sort of added into the disc into the representations every di at each dialogue step , by the discourse model  discourse  model , Yeah , that 's what it 's called. and , um , it does some help in the anaphora resolution and it also helps in coordinating the gesture screen issues. So a person pointing to something on the screen , you know , the discourse model actually stores what was presented at what location on the s on the screen
Hmm.
so it 's a  it 's a rather huge   huge thing but um    um    we can  sort of  It has a very clear interface. We can query it whether admission fees were discussed in the last turn and  and the turn before that or you know how  deep we want to search