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