[{'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: 2.8. Polls and Surveys We conduct our own surveys and polls and also help third parties do this type of research. Your participation in surveys or polls is up to you. You may also opt out of getting invitations to participate in surveys."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]