[{'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: Direct marketing opt out. If you have elected to receive direct marketing communications from us, you can change your mind at any time by following the opt out link in any marketing communication that is sent to you. If you have elected to receive more than one type of marketing communications from us, you may need to opt out of all of them individually. It may take a few days for us to update our records before any opt out is effective."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]