[{'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: send you newsletters, promotions or marketing materials. We will provide you with the opportunity to opt out of receiving such materials in the future. You may also opt out of receiving such materials at any time in accordance with the instructions provided in this Privacy Policy; contact you in relation to contest registration and prize acceptance; contact you in the scope of talent recruitment."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]