[{'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: This app may store in your device or storage unit some data related to advertisements or other data in order to provide a better user experience. To learn how to delete these data form your device please refer to the device manual and/or privacy policy of your device."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]