[{'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: We send two kinds of email: ones about fun stuff happening on Tumblr, and ones with important information about your account. You can opt out of the former, but not the latter."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]