[{'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: Several of the services that we offer require registration as a condition of use. We may also receive Personal Information about you from other sources and add it to the information you have provided to us. For example, our Salesify division may collect information about you from databases provided by its customers, from public sources, or via telephone research efforts."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]