[{'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: User Access and Choice If your PII changes, you may update it (or correct it if it is incorrect) by contacting us. If you'd like us to help you remove any of your PII that we have previously collected through the Comcast Sites or that is currently posted on the Comcast Sites in a public forum, directory, or testimonial, please contact us. We will respond to your request within 30 days. In some cases, we may not be able to remove your PII, in which case we will let you know if we are unable to do so and why."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]