[{'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: Are Children Allowed to Use Amazon.com? Amazon.com does not sell products for purchase by children. We sell children's products for purchase by adults. If you are under 18, you may use Amazon.com only with the involvement of a parent or guardian."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]