[{'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: You have choices about the data we collect. When you are asked to provide personal data, you may decline. But if you choose not to provide data that is necessary to provide a product or feature, you may not be able to use that product or feature."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]