[{'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 permission allow Walk Band to vibrate when press keys on piano keyboard. This will make piano keyboard more responsive. com.android.vending.BILLING This permission is required by Walk Band to remvoe advertisement by paid 0.99 USD through Google Play. android.permission.CHANGE_CONFIGURATION"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]