[{'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: Data Retention. The time period for which we keep information varies according to the information's use. In some cases, there are legal requirements to keep data for a minimum period. Unless there is a specific legal requirement for us to keep the information, we will retain it for no longer than is necessary to fulfill a legitimate business need."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]