[{'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 some cases, we may not be able to update, amend or remove your Personal Information, in which case we will let you know why we are unable to do so - for example, certain requests may require disproportionate technical effort or extremely impractical (e.g. any requests that relate to our backup systems), or are prohibited by law."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]