dialogue: THEM: i would like the hat and 3 balls <eos> YOU: i need at least one ball <eos> THEM: ok . can i have the book , hat , and 2 balls ? <eos> YOU: no , i get book and one ball <eos> THEM: ok deal <eos> YOU: <selection>
output: item0=1 item1=0 item2=1 item0=0 item1=1 item2=2