dialogue: YOU: i need two balls and a hat . <eos> THEM: i need both hats . will you accept 2 balls and a book ? <eos> YOU: i'll just take the two balls , don't want the books . <eos> THEM: so i get both hats , both books , you just want the 2 balls ? <eos> YOU: <selection>
output: item0=0 item1=0 item2=2 item0=2 item1=2 item2=0