[{'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: We also don't want your personal information for any longer than we need it, so we only keep it long enough to do what we collected it for. Once we don't need it, we take steps to destroy it unless we are required by law to keep it longer."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]