hello , do you know of any points of interest in the centre of cambridge ?
{'service': 'attraction', 'act': 'request', 'slot_name': 'type', 'value': '?'} {'service': 'attraction', 'act': 'inform', 'slot_name': 'area', 'value': 'center of town'} {'service': 'attraction', 'act': 'inform', 'slot_name': 'choice', 'value': '44'}
there are 44 attractions in the center of town . what types are you interested in ?