[{'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: How do we use the information we collect? We use the information we collect to provide our products to you and make them better, develop new products, and protect Pinterest and our users. For example, we may log how often people use two different versions of a product, which can help us understand which version is better. If you make a purchase on Pinterest, we'll save your payment information and contact information so that you can use them the next time you want to buy something on Pinterest."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_1stParty.'}]