dialogue: THEM: hey i really want the book and hat <eos> YOU: i need the book and 2 balls <eos> THEM: i need the hat and 2 balls . so how about the book and 1 ball for you ? <eos> YOU: hmmmm . deal <eos> THEM: <selection>
output: item0=1 item1=0 item2=1 item0=0 item1=1 item2=2