[{'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: 5.3. We use Facebook's Custom Audience feature to target users with advertising from time to time. Custom Audiences allow us to target ads to a specific set of people through Facebook. You can manage your privacy settings in the privacy tab of your Facebook account."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]