You will be given a definition of a task first, then some input of the task.
Given a part of privacy policy text, identify the purpose for which the user information is collected/used. The purpose should be given inside the policy text, answer as 'Not Specified' otherwise

The site collects your demographic information for a basic service or feature. Collection happens on the website for users with accounts. You can opt in for data collection.
Output:
Basic service/feature