[{'role': 'USR', 'utterance': "what happened? Why didn't he win?"}
 {'role': 'SYS', 'utterance': "didn't you hear? He was disqualified."}
 {'role': 'USR', 'utterance': "how did that happen? He's so talented! I thought he had a great chance of winning a gold medal!"}
 {'role': 'SYS', 'utterance': "if he didn't have any drug problems, he would have won."}
 {'role': 'USR', 'utterance': 'what? What kind of drugs was he using?'}
 {'role': 'SYS', 'utterance': 'he was taking steroids to make him stronger and faster.'}
 {'role': 'USR', 'utterance': 'I thought that all athletes were supposed to be regularly tested for drugs.'}]
{'role': 'SYS', 'utterance': "they are. The reason why they didn't disqualify him until after the race is because the results from the text only came back afterwards."}