[{'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: In general, our policy is to keep personal information for no longer than reasonably necessary in light of the purpose for which the information was collected, plus any additional period that is permitted or required by law thereafter. Following the expiration of the purpose for which we collected personal information plus any additional period that is permitted or required by law, we will either delete or de-identify the information from our systems."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]