[{'role': 'USR', 'utterance': 'Susan, Did you know the four ugliest women in ancient China?'}
 {'role': 'SYS', 'utterance': 'No, I only know four great beauties of China.'}
 {'role': 'USR', 'utterance': 'There were some famous ugly women in history.'}
 {'role': 'SYS', 'utterance': 'Yeah? Were they famous because of the ugliness?'}
 {'role': 'USR', 'utterance': 'Though they were ugly, they had great virtue.'}]
{'role': 'SYS', 'utterance': 'Then who were they?'}