[{'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: This information helps: ensure that appropriate advertising is shown in the application or on the website calculate and control the number of unique and repeat views of a given ad deliver ads that relate to your interests measure the effectiveness of ad campaigns"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]