[{'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: 4. We record and retain details of users\' activities on the Sites. Information relating to such transactions including, but not limited to, the types and specifications of the goods, pricing and delivery information and any trade dispute records ("Activities Information") may be collected when sale and purchase transactions are conducted on or facilitated through the Sites'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]