[{'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: to develop new and enhance existing BlackBerry Offerings including to communicate with you about them using various means, e.g. to make available or send to you: upgrades or updates, or notices of upgrades or updates of BlackBerry Offerings or third party content or related products, services and software; notices of promotions and upcoming events;"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]