[{'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: Retention time The Data is kept for the time necessary to provide the service requested by the User, or stated by the purposes outlined in this document, and the User can always request that the Data Controller suspend or remove the data."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]