[{'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: Collection of Device and Technical Information We collect the data necessary for you to use our app and for us to maintain and analyze the functioning of the app, to personalize the content of the app, and to display contextual advertisements."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]