[{'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 advertisers typically use third party companies to audit the delivery and performance of their ads on websites and apps. We also allow these companies to collect this information on Pinterest. To learn more, please see our Help Center."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]