[{'role': 'USR', 'utterance': 'If you go out recently you will find some people riding scooters in high streets and back lanes.'}]
{'role': 'SYS', 'utterance': 'Yes. The German engineer would never dreamed that the hand - supported scooter he invented several years ago to solve his traffic problems would become so fashionable in the Occident within a few years and even spread to Japan and China.'}