[{'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: Our app uses Facebook as ads provider. Facebook wants to show ads that are relevant to you. For more information, please check https://m.facebook.com/ads/ad_choices."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]