[{'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: Sometimes we may appear at a "live" or in-person event such as a trade show or promotion. If we collect any personally identifiable information in such a case, this policy will apply.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]