[{'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: Measure reach and effectiveness of advertisements campaigns, to offer targeted advertising, to personalize experience by showing advertisements for products and services that are more likely to appeal to the User (i.e. behavioral advertising)."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]