[{'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: Online Survey Data. We may periodically conduct voluntary member surveys. We encourage our members to participate in such surveys because they provide us with important information regarding the improvement of our services. You may also volunteer for certain surveys that we may offer to our users, and any additional rules regarding the conduct of such surveys will be disclosed to you prior to your participation. We do not link the survey responses to any PII, and all responses are anonymous."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]