[{'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: Show and measure ads and Services. We use information to improve our advertising and measurement systems so that we can show you relevant ads on our Services and measure the effectiveness and reach of the ads and services. Learn more about how to control information about you that is used to personalize the ads here."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]