[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: Voice data for service improvement. We collect, and use for service improvement, voice search requests or samples of voice commands occurring while using Kinect. These data are stored separately from your Xbox profile."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]