[{'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: Widget Data: We may tailor the Services for you based on your visits to third-party websites that integrate Twitter buttons or widgets. When these websites first load our buttons or widgets for display, we receive Log Data that includes the web page you visited and a cookie that identifies your browser ("Widget Data"). After a maximum of 10 days, we start the process of deleting, de-identifying, or aggregating Widget Data, which is usually instantaneous but in some cases may take up to a week. We may use Widget Data to tailor content for you, such as suggestions for people to follow and other content you may be interested in. Tailored content is stored separately from other Widget Data such as page-visit information. You can control this feature from the Personalization Setting within your Privacy Settings, available at https://twitter.com/settings/safety.'}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_1stParty.'}]