[{'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: Links: We may keep track of how you interact with links across our Services, including our email notifications, third-party services, and client applications, by redirecting clicks or through other means. We do this to help improve our Services, to provide more relevant advertising, and to be able to share aggregate click statistics such as how many times a particular link was clicked on. Links, Tweets, and non-public communications like Direct Messages shared on the Services will be processed and links shortened to a http://t.co link."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]