dialogue: YOU: i would like the hat and the ball and one book . <eos> THEM: i can offer you the hat and one book <eos> YOU: how about i take the hat and the ball and you take all the books ? <eos> THEM: i need the ball and three books <eos> YOU: ok , i agree . <eos> THEM: <selection>
output: item0=1 item1=1 item2=0 item0=3 item1=0 item2=1